/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 15:42:47,667 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 15:42:47,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 15:42:47,724 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 15:42:47,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 15:42:47,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 15:42:47,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 15:42:47,772 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2022-01-18 15:42:47,788 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 15:42:47,789 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 15:42:47,789 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 15:42:47,789 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 15:42:47,790 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 15:42:47,790 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 15:42:47,790 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 15:42:47,790 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 15:42:47,790 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 15:42:47,791 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 15:42:47,791 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 15:42:47,791 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 15:42:47,791 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 15:42:47,791 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 15:42:47,791 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 15:42:47,791 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 15:42:47,792 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 15:42:47,792 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 15:42:47,792 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 15:42:47,792 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 15:42:47,792 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 15:42:47,792 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 15:42:47,792 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 15:42:47,792 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 15:42:47,793 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 15:42:47,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 15:42:47,793 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 15:42:47,793 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 15:42:47,793 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 15:42:47,793 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 15:42:47,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 15:42:47,794 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 15:42:47,794 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 15:42:47,794 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 15:42:47,794 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 15:42:47,980 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 15:42:48,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 15:42:48,004 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 15:42:48,005 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 15:42:48,008 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 15:42:48,009 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1.wvr.bpl [2022-01-18 15:42:48,009 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1.wvr.bpl' [2022-01-18 15:42:48,030 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 15:42:48,031 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 15:42:48,035 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 15:42:48,035 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 15:42:48,035 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 15:42:48,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:42:48" (1/1) ... [2022-01-18 15:42:48,053 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:42:48" (1/1) ... [2022-01-18 15:42:48,060 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 15:42:48,062 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 15:42:48,063 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 15:42:48,063 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 15:42:48,063 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 15:42:48,069 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:42:48" (1/1) ... [2022-01-18 15:42:48,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:42:48" (1/1) ... [2022-01-18 15:42:48,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:42:48" (1/1) ... [2022-01-18 15:42:48,071 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:42:48" (1/1) ... [2022-01-18 15:42:48,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:42:48" (1/1) ... [2022-01-18 15:42:48,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:42:48" (1/1) ... [2022-01-18 15:42:48,076 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:42:48" (1/1) ... [2022-01-18 15:42:48,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 15:42:48,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 15:42:48,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 15:42:48,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 15:42:48,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:42:48" (1/1) ... [2022-01-18 15:42:48,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 15:42:48,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:48,106 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-18 15:42:48,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-18 15:42:48,133 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 15:42:48,133 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 15:42:48,133 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 15:42:48,133 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 15:42:48,134 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 15:42:48,134 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 15:42:48,134 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 15:42:48,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 15:42:48,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 15:42:48,135 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 15:42:48,135 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 15:42:48,135 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 15:42:48,135 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-01-18 15:42:48,135 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-01-18 15:42:48,135 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-01-18 15:42:48,136 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 15:42:48,173 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 15:42:48,177 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 15:42:48,262 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 15:42:48,280 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 15:42:48,280 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-18 15:42:48,281 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2022-01-18 15:42:48,281 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2022-01-18 15:42:48,281 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2022-01-18 15:42:48,281 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2022-01-18 15:42:48,283 INFO L202 PluginConnector]: Adding new model parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 03:42:48 BoogieIcfgContainer [2022-01-18 15:42:48,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 15:42:48,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 15:42:48,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 15:42:48,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 15:42:48,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:42:48" (1/2) ... [2022-01-18 15:42:48,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12fe2c66 and model type parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 03:42:48, skipping insertion in model container [2022-01-18 15:42:48,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 03:42:48" (2/2) ... [2022-01-18 15:42:48,303 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-1.wvr.bpl [2022-01-18 15:42:48,307 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 15:42:48,307 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 15:42:48,307 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 15:42:48,307 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 15:42:48,360 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-01-18 15:42:48,406 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 15:42:48,423 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 15:42:48,423 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-01-18 15:42:48,431 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 29 transitions, 90 flow [2022-01-18 15:42:48,517 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 164 states, 163 states have (on average 3.7484662576687118) internal successors, (611), 163 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:48,519 INFO L276 IsEmpty]: Start isEmpty. Operand has 164 states, 163 states have (on average 3.7484662576687118) internal successors, (611), 163 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:48,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:42:48,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:48,529 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:48,530 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:42:48,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:48,534 INFO L85 PathProgramCache]: Analyzing trace with hash 530210260, now seen corresponding path program 1 times [2022-01-18 15:42:48,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:48,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106461278] [2022-01-18 15:42:48,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:48,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:48,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:48,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:48,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106461278] [2022-01-18 15:42:48,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106461278] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:42:48,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:42:48,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 15:42:48,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793968282] [2022-01-18 15:42:48,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:42:48,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 15:42:48,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:48,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 15:42:48,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 15:42:48,693 INFO L87 Difference]: Start difference. First operand has 164 states, 163 states have (on average 3.7484662576687118) internal successors, (611), 163 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:48,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:48,774 INFO L93 Difference]: Finished difference Result 324 states and 1218 transitions. [2022-01-18 15:42:48,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 15:42:48,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:42:48,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:48,789 INFO L225 Difference]: With dead ends: 324 [2022-01-18 15:42:48,790 INFO L226 Difference]: Without dead ends: 319 [2022-01-18 15:42:48,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 15:42:48,794 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:48,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:42:48,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-01-18 15:42:48,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 204. [2022-01-18 15:42:48,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 3.7339901477832513) internal successors, (758), 203 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:48,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 758 transitions. [2022-01-18 15:42:48,873 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 758 transitions. Word has length 15 [2022-01-18 15:42:48,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:48,874 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 758 transitions. [2022-01-18 15:42:48,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:48,874 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 758 transitions. [2022-01-18 15:42:48,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:42:48,877 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:48,877 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:48,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 15:42:48,877 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:42:48,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:48,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1551040747, now seen corresponding path program 1 times [2022-01-18 15:42:48,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:48,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170382567] [2022-01-18 15:42:48,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:48,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:48,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:48,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:48,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170382567] [2022-01-18 15:42:48,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170382567] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:48,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254828600] [2022-01-18 15:42:48,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:48,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:48,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:48,943 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:48,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 15:42:48,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:48,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 15:42:48,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:49,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:49,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-18 15:42:49,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254828600] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:42:49,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-18 15:42:49,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-18 15:42:49,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488115693] [2022-01-18 15:42:49,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:42:49,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 15:42:49,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:49,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 15:42:49,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 15:42:49,095 INFO L87 Difference]: Start difference. First operand 204 states and 758 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:49,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:49,184 INFO L93 Difference]: Finished difference Result 500 states and 1907 transitions. [2022-01-18 15:42:49,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 15:42:49,184 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:42:49,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:49,194 INFO L225 Difference]: With dead ends: 500 [2022-01-18 15:42:49,195 INFO L226 Difference]: Without dead ends: 453 [2022-01-18 15:42:49,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 15:42:49,197 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:49,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 36 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:42:49,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-01-18 15:42:49,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 434. [2022-01-18 15:42:49,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.8960739030023093) internal successors, (1687), 433 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:49,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1687 transitions. [2022-01-18 15:42:49,241 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1687 transitions. Word has length 17 [2022-01-18 15:42:49,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:49,241 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1687 transitions. [2022-01-18 15:42:49,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:49,242 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1687 transitions. [2022-01-18 15:42:49,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:42:49,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:49,246 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:49,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-18 15:42:49,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:49,468 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:42:49,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:49,469 INFO L85 PathProgramCache]: Analyzing trace with hash -874800337, now seen corresponding path program 1 times [2022-01-18 15:42:49,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:49,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791554516] [2022-01-18 15:42:49,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:49,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:49,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:49,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:49,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:49,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791554516] [2022-01-18 15:42:49,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791554516] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:49,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317416162] [2022-01-18 15:42:49,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:49,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:49,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:49,511 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:49,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 15:42:49,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:49,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 15:42:49,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:49,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:49,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-18 15:42:49,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317416162] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:42:49,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-18 15:42:49,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-18 15:42:49,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50664877] [2022-01-18 15:42:49,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:42:49,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 15:42:49,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:49,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 15:42:49,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-18 15:42:49,666 INFO L87 Difference]: Start difference. First operand 434 states and 1687 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:49,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:49,725 INFO L93 Difference]: Finished difference Result 734 states and 2844 transitions. [2022-01-18 15:42:49,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 15:42:49,726 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:42:49,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:49,731 INFO L225 Difference]: With dead ends: 734 [2022-01-18 15:42:49,732 INFO L226 Difference]: Without dead ends: 715 [2022-01-18 15:42:49,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-18 15:42:49,735 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 23 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:49,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 39 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:42:49,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-01-18 15:42:49,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 681. [2022-01-18 15:42:49,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 3.9426470588235296) internal successors, (2681), 680 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:49,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 2681 transitions. [2022-01-18 15:42:49,784 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 2681 transitions. Word has length 17 [2022-01-18 15:42:49,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:49,786 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 2681 transitions. [2022-01-18 15:42:49,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:49,786 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 2681 transitions. [2022-01-18 15:42:49,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:49,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:49,790 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:49,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:50,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-18 15:42:50,015 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:42:50,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:50,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1239957648, now seen corresponding path program 1 times [2022-01-18 15:42:50,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:50,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904403479] [2022-01-18 15:42:50,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:50,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:50,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:50,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:50,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:50,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904403479] [2022-01-18 15:42:50,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904403479] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:50,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82089568] [2022-01-18 15:42:50,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:50,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:50,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:50,200 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:50,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 15:42:50,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:50,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:50,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:50,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-18 15:42:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:50,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:50,579 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:50,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:42:50,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:50,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82089568] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:50,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:50,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-01-18 15:42:50,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179514552] [2022-01-18 15:42:50,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:50,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:42:50,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:50,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:42:50,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:42:50,685 INFO L87 Difference]: Start difference. First operand 681 states and 2681 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:51,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:51,094 INFO L93 Difference]: Finished difference Result 1065 states and 4160 transitions. [2022-01-18 15:42:51,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:42:51,094 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:51,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:51,102 INFO L225 Difference]: With dead ends: 1065 [2022-01-18 15:42:51,102 INFO L226 Difference]: Without dead ends: 1050 [2022-01-18 15:42:51,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:42:51,103 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 89 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:51,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 188 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 482 Invalid, 0 Unknown, 20 Unchecked, 0.3s Time] [2022-01-18 15:42:51,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2022-01-18 15:42:51,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 711. [2022-01-18 15:42:51,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 710 states have (on average 3.9704225352112674) internal successors, (2819), 710 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:51,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 2819 transitions. [2022-01-18 15:42:51,134 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 2819 transitions. Word has length 19 [2022-01-18 15:42:51,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:51,134 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 2819 transitions. [2022-01-18 15:42:51,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:51,135 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 2819 transitions. [2022-01-18 15:42:51,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:51,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:51,137 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:51,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:51,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:51,360 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:42:51,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:51,360 INFO L85 PathProgramCache]: Analyzing trace with hash -654623696, now seen corresponding path program 2 times [2022-01-18 15:42:51,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:51,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176308435] [2022-01-18 15:42:51,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:51,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:51,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:51,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:51,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176308435] [2022-01-18 15:42:51,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176308435] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:51,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051718801] [2022-01-18 15:42:51,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:42:51,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:51,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:51,476 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:51,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 15:42:51,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:42:51,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:51,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:42:51,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:51,598 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:51,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:42:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:51,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:51,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:51,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051718801] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:51,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:51,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-01-18 15:42:51,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168393235] [2022-01-18 15:42:51,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:51,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:42:51,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:51,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:42:51,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:42:51,876 INFO L87 Difference]: Start difference. First operand 711 states and 2819 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:52,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:52,465 INFO L93 Difference]: Finished difference Result 1057 states and 4144 transitions. [2022-01-18 15:42:52,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:42:52,466 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:52,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:52,472 INFO L225 Difference]: With dead ends: 1057 [2022-01-18 15:42:52,473 INFO L226 Difference]: Without dead ends: 1035 [2022-01-18 15:42:52,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:42:52,474 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 200 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:52,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 156 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:42:52,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2022-01-18 15:42:52,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 723. [2022-01-18 15:42:52,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 3.9709141274238227) internal successors, (2867), 722 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:52,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 2867 transitions. [2022-01-18 15:42:52,502 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 2867 transitions. Word has length 19 [2022-01-18 15:42:52,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:52,503 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 2867 transitions. [2022-01-18 15:42:52,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:52,503 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 2867 transitions. [2022-01-18 15:42:52,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:52,505 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:52,505 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:52,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:52,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:52,719 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:42:52,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:52,720 INFO L85 PathProgramCache]: Analyzing trace with hash 958943038, now seen corresponding path program 3 times [2022-01-18 15:42:52,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:52,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512266561] [2022-01-18 15:42:52,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:52,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:52,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:52,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:52,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:52,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512266561] [2022-01-18 15:42:52,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512266561] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:52,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113261879] [2022-01-18 15:42:52,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:42:52,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:52,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:52,832 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:52,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 15:42:52,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:42:52,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:52,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:42:52,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:52,952 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:52,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:42:53,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:53,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:53,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113261879] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:53,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:53,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-01-18 15:42:53,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824709276] [2022-01-18 15:42:53,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:53,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:42:53,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:53,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:42:53,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:42:53,217 INFO L87 Difference]: Start difference. First operand 723 states and 2867 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:53,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:53,753 INFO L93 Difference]: Finished difference Result 1048 states and 4116 transitions. [2022-01-18 15:42:53,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:42:53,754 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:53,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:53,761 INFO L225 Difference]: With dead ends: 1048 [2022-01-18 15:42:53,761 INFO L226 Difference]: Without dead ends: 1033 [2022-01-18 15:42:53,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:42:53,762 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 196 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:53,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 151 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:42:53,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2022-01-18 15:42:53,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 723. [2022-01-18 15:42:53,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 3.9709141274238227) internal successors, (2867), 722 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:53,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 2867 transitions. [2022-01-18 15:42:53,790 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 2867 transitions. Word has length 19 [2022-01-18 15:42:53,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:53,790 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 2867 transitions. [2022-01-18 15:42:53,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:53,790 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 2867 transitions. [2022-01-18 15:42:53,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:53,793 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:53,793 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:53,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:54,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:54,016 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:42:54,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:54,016 INFO L85 PathProgramCache]: Analyzing trace with hash -890460270, now seen corresponding path program 4 times [2022-01-18 15:42:54,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:54,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663935860] [2022-01-18 15:42:54,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:54,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:54,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:54,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663935860] [2022-01-18 15:42:54,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663935860] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:54,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983718473] [2022-01-18 15:42:54,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:42:54,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:54,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:54,123 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:54,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 15:42:54,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:42:54,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:54,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:54,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:54,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-01-18 15:42:54,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:54,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:54,399 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:54,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:42:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:54,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983718473] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:54,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:54,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-01-18 15:42:54,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898633750] [2022-01-18 15:42:54,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:54,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:42:54,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:54,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:42:54,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:42:54,470 INFO L87 Difference]: Start difference. First operand 723 states and 2867 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:54,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:54,896 INFO L93 Difference]: Finished difference Result 1455 states and 5699 transitions. [2022-01-18 15:42:54,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:42:54,896 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:54,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:54,906 INFO L225 Difference]: With dead ends: 1455 [2022-01-18 15:42:54,906 INFO L226 Difference]: Without dead ends: 1437 [2022-01-18 15:42:54,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:42:54,907 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 181 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:54,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 191 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 557 Invalid, 0 Unknown, 26 Unchecked, 0.3s Time] [2022-01-18 15:42:54,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2022-01-18 15:42:54,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 799. [2022-01-18 15:42:54,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 4.006265664160401) internal successors, (3197), 798 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:54,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 3197 transitions. [2022-01-18 15:42:54,938 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 3197 transitions. Word has length 19 [2022-01-18 15:42:54,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:54,938 INFO L470 AbstractCegarLoop]: Abstraction has 799 states and 3197 transitions. [2022-01-18 15:42:54,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:54,938 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 3197 transitions. [2022-01-18 15:42:54,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:54,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:54,941 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:54,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:55,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:55,155 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:42:55,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:55,155 INFO L85 PathProgramCache]: Analyzing trace with hash -809061214, now seen corresponding path program 5 times [2022-01-18 15:42:55,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:55,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315061735] [2022-01-18 15:42:55,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:55,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:55,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:55,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:55,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315061735] [2022-01-18 15:42:55,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315061735] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:55,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308567868] [2022-01-18 15:42:55,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:42:55,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:55,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:55,275 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:55,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 15:42:55,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:42:55,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:55,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:55,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:55,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:42:55,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:55,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:55,531 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:55,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:42:55,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:55,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308567868] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:55,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:55,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-01-18 15:42:55,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611131705] [2022-01-18 15:42:55,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:55,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:42:55,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:55,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:42:55,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:42:55,588 INFO L87 Difference]: Start difference. First operand 799 states and 3197 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:56,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:56,021 INFO L93 Difference]: Finished difference Result 1291 states and 5089 transitions. [2022-01-18 15:42:56,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:42:56,021 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:56,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:56,029 INFO L225 Difference]: With dead ends: 1291 [2022-01-18 15:42:56,030 INFO L226 Difference]: Without dead ends: 1273 [2022-01-18 15:42:56,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:42:56,030 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 134 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:56,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 188 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 543 Invalid, 0 Unknown, 30 Unchecked, 0.3s Time] [2022-01-18 15:42:56,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2022-01-18 15:42:56,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 819. [2022-01-18 15:42:56,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 4.02078239608802) internal successors, (3289), 818 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:56,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 3289 transitions. [2022-01-18 15:42:56,060 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 3289 transitions. Word has length 19 [2022-01-18 15:42:56,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:56,060 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 3289 transitions. [2022-01-18 15:42:56,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:56,061 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 3289 transitions. [2022-01-18 15:42:56,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:56,063 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:56,063 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:56,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:56,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:56,280 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:42:56,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:56,280 INFO L85 PathProgramCache]: Analyzing trace with hash 804505520, now seen corresponding path program 6 times [2022-01-18 15:42:56,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:56,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036015226] [2022-01-18 15:42:56,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:56,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:56,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:56,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036015226] [2022-01-18 15:42:56,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036015226] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:56,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007684124] [2022-01-18 15:42:56,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:42:56,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:56,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:56,367 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:56,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 15:42:56,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:42:56,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:56,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:42:56,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:56,450 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:56,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:42:56,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:56,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:56,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:56,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007684124] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:56,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:56,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-01-18 15:42:56,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748949150] [2022-01-18 15:42:56,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:56,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:42:56,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:56,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:42:56,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:42:56,682 INFO L87 Difference]: Start difference. First operand 819 states and 3289 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:56,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:56,849 INFO L93 Difference]: Finished difference Result 1065 states and 4245 transitions. [2022-01-18 15:42:56,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:42:56,850 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:56,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:56,856 INFO L225 Difference]: With dead ends: 1065 [2022-01-18 15:42:56,856 INFO L226 Difference]: Without dead ends: 1054 [2022-01-18 15:42:56,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:42:56,857 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 60 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:56,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 83 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:42:56,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2022-01-18 15:42:56,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 825. [2022-01-18 15:42:56,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 4.020631067961165) internal successors, (3313), 824 states have internal predecessors, (3313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:56,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 3313 transitions. [2022-01-18 15:42:56,882 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 3313 transitions. Word has length 19 [2022-01-18 15:42:56,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:56,882 INFO L470 AbstractCegarLoop]: Abstraction has 825 states and 3313 transitions. [2022-01-18 15:42:56,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:56,882 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 3313 transitions. [2022-01-18 15:42:56,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:56,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:56,885 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:56,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:57,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-01-18 15:42:57,108 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:42:57,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:57,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1396703890, now seen corresponding path program 1 times [2022-01-18 15:42:57,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:57,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021898350] [2022-01-18 15:42:57,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:57,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:57,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:57,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:57,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:57,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021898350] [2022-01-18 15:42:57,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021898350] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:57,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205647904] [2022-01-18 15:42:57,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:57,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:57,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:57,207 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:57,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 15:42:57,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:57,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:42:57,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:57,324 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:57,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 15:42:57,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:57,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:57,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:57,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205647904] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:57,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:57,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-01-18 15:42:57,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044069169] [2022-01-18 15:42:57,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:57,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:42:57,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:57,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:42:57,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:42:57,542 INFO L87 Difference]: Start difference. First operand 825 states and 3313 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:57,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:57,846 INFO L93 Difference]: Finished difference Result 1245 states and 4941 transitions. [2022-01-18 15:42:57,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:42:57,846 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:57,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:57,854 INFO L225 Difference]: With dead ends: 1245 [2022-01-18 15:42:57,854 INFO L226 Difference]: Without dead ends: 1228 [2022-01-18 15:42:57,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:42:57,855 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 118 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:57,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 133 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:42:57,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2022-01-18 15:42:57,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 845. [2022-01-18 15:42:57,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 4.0260663507109005) internal successors, (3398), 844 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:57,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 3398 transitions. [2022-01-18 15:42:57,883 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 3398 transitions. Word has length 19 [2022-01-18 15:42:57,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:57,884 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 3398 transitions. [2022-01-18 15:42:57,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:57,884 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 3398 transitions. [2022-01-18 15:42:57,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:57,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:57,887 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:57,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:58,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-18 15:42:58,111 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:42:58,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:58,112 INFO L85 PathProgramCache]: Analyzing trace with hash -883177038, now seen corresponding path program 2 times [2022-01-18 15:42:58,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:58,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180519981] [2022-01-18 15:42:58,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:58,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:58,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:58,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:58,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:58,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180519981] [2022-01-18 15:42:58,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180519981] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:58,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664682806] [2022-01-18 15:42:58,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:42:58,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:58,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:58,202 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:58,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 15:42:58,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:42:58,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:58,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:42:58,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:58,281 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:58,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:42:58,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:58,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:58,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:58,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664682806] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:58,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:58,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-01-18 15:42:58,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028378447] [2022-01-18 15:42:58,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:58,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 15:42:58,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:58,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 15:42:58,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-18 15:42:58,483 INFO L87 Difference]: Start difference. First operand 845 states and 3398 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:58,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:58,645 INFO L93 Difference]: Finished difference Result 1126 states and 4474 transitions. [2022-01-18 15:42:58,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:42:58,645 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:58,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:58,651 INFO L225 Difference]: With dead ends: 1126 [2022-01-18 15:42:58,651 INFO L226 Difference]: Without dead ends: 1102 [2022-01-18 15:42:58,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-01-18 15:42:58,652 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 58 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:58,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 84 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:42:58,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2022-01-18 15:42:58,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 862. [2022-01-18 15:42:58,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 4.02555168408827) internal successors, (3466), 861 states have internal predecessors, (3466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:58,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 3466 transitions. [2022-01-18 15:42:58,676 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 3466 transitions. Word has length 19 [2022-01-18 15:42:58,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:58,677 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 3466 transitions. [2022-01-18 15:42:58,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:58,677 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 3466 transitions. [2022-01-18 15:42:58,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:58,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:58,679 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:58,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:58,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-18 15:42:58,895 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:42:58,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:58,896 INFO L85 PathProgramCache]: Analyzing trace with hash 192534118, now seen corresponding path program 3 times [2022-01-18 15:42:58,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:58,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260559913] [2022-01-18 15:42:58,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:58,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:58,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:58,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:58,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260559913] [2022-01-18 15:42:58,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260559913] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:58,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783797324] [2022-01-18 15:42:58,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:42:58,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:58,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:58,971 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:58,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 15:42:59,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:42:59,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:59,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:42:59,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:59,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:42:59,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:42:59,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:59,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:59,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:59,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783797324] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:59,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:59,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-01-18 15:42:59,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979845442] [2022-01-18 15:42:59,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:59,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:42:59,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:59,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:42:59,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:42:59,276 INFO L87 Difference]: Start difference. First operand 862 states and 3466 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:59,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:59,491 INFO L93 Difference]: Finished difference Result 1121 states and 4460 transitions. [2022-01-18 15:42:59,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:42:59,491 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:59,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:59,497 INFO L225 Difference]: With dead ends: 1121 [2022-01-18 15:42:59,497 INFO L226 Difference]: Without dead ends: 1104 [2022-01-18 15:42:59,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:42:59,498 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 57 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:59,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 109 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:42:59,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2022-01-18 15:42:59,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 862. [2022-01-18 15:42:59,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 4.02555168408827) internal successors, (3466), 861 states have internal predecessors, (3466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:59,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 3466 transitions. [2022-01-18 15:42:59,522 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 3466 transitions. Word has length 19 [2022-01-18 15:42:59,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:59,523 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 3466 transitions. [2022-01-18 15:42:59,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:59,523 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 3466 transitions. [2022-01-18 15:42:59,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:59,527 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:59,527 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:59,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:59,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-18 15:42:59,749 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:42:59,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:59,750 INFO L85 PathProgramCache]: Analyzing trace with hash -987196392, now seen corresponding path program 4 times [2022-01-18 15:42:59,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:59,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420769515] [2022-01-18 15:42:59,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:59,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:59,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:59,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:59,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420769515] [2022-01-18 15:42:59,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420769515] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:59,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034310054] [2022-01-18 15:42:59,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:42:59,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:59,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:59,830 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:59,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 15:42:59,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:42:59,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:59,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:59,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:59,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 15:43:00,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:00,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:00,083 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:00,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:43:00,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:00,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034310054] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:00,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:00,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-01-18 15:43:00,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857170377] [2022-01-18 15:43:00,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:00,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:43:00,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:00,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:43:00,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:43:00,135 INFO L87 Difference]: Start difference. First operand 862 states and 3466 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:00,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:00,532 INFO L93 Difference]: Finished difference Result 1647 states and 6509 transitions. [2022-01-18 15:43:00,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:43:00,533 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:43:00,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:00,542 INFO L225 Difference]: With dead ends: 1647 [2022-01-18 15:43:00,542 INFO L226 Difference]: Without dead ends: 1629 [2022-01-18 15:43:00,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:43:00,543 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 174 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:00,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 213 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 586 Invalid, 0 Unknown, 89 Unchecked, 0.3s Time] [2022-01-18 15:43:00,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2022-01-18 15:43:00,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 924. [2022-01-18 15:43:00,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 923 states have (on average 4.073672806067172) internal successors, (3760), 923 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:00,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 3760 transitions. [2022-01-18 15:43:00,572 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 3760 transitions. Word has length 19 [2022-01-18 15:43:00,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:00,573 INFO L470 AbstractCegarLoop]: Abstraction has 924 states and 3760 transitions. [2022-01-18 15:43:00,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:00,573 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 3760 transitions. [2022-01-18 15:43:00,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:43:00,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:00,576 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:00,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:00,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-18 15:43:00,795 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:00,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:00,796 INFO L85 PathProgramCache]: Analyzing trace with hash -399451070, now seen corresponding path program 5 times [2022-01-18 15:43:00,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:00,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258274646] [2022-01-18 15:43:00,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:00,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:00,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:00,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:00,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:00,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258274646] [2022-01-18 15:43:00,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258274646] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:00,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569274691] [2022-01-18 15:43:00,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:43:00,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:00,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:00,880 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:00,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 15:43:00,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:43:00,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:00,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:00,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:01,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:43:01,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:01,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:01,114 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:01,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 24 [2022-01-18 15:43:01,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:01,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569274691] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:01,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:01,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-01-18 15:43:01,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962530392] [2022-01-18 15:43:01,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:01,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:43:01,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:01,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:43:01,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:43:01,162 INFO L87 Difference]: Start difference. First operand 924 states and 3760 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:01,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:01,546 INFO L93 Difference]: Finished difference Result 1473 states and 5876 transitions. [2022-01-18 15:43:01,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:43:01,546 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:43:01,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:01,553 INFO L225 Difference]: With dead ends: 1473 [2022-01-18 15:43:01,553 INFO L226 Difference]: Without dead ends: 1455 [2022-01-18 15:43:01,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:43:01,554 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 145 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:01,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 177 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:43:01,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2022-01-18 15:43:01,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 954. [2022-01-18 15:43:01,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 4.092339979013641) internal successors, (3900), 953 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:01,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3900 transitions. [2022-01-18 15:43:01,601 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3900 transitions. Word has length 19 [2022-01-18 15:43:01,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:01,601 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 3900 transitions. [2022-01-18 15:43:01,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:01,601 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3900 transitions. [2022-01-18 15:43:01,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:43:01,604 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:01,604 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:01,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:01,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-18 15:43:01,826 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:01,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:01,827 INFO L85 PathProgramCache]: Analyzing trace with hash 676260086, now seen corresponding path program 6 times [2022-01-18 15:43:01,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:01,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355336788] [2022-01-18 15:43:01,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:01,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:01,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:01,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355336788] [2022-01-18 15:43:01,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355336788] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:01,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497942487] [2022-01-18 15:43:01,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:43:01,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:01,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:01,905 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:01,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 15:43:01,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:43:01,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:01,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:43:01,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:02,003 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:02,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:43:02,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:02,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:02,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:02,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497942487] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:02,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:02,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-01-18 15:43:02,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835497703] [2022-01-18 15:43:02,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:02,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:43:02,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:02,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:43:02,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:43:02,226 INFO L87 Difference]: Start difference. First operand 954 states and 3900 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:02,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:02,425 INFO L93 Difference]: Finished difference Result 1199 states and 4849 transitions. [2022-01-18 15:43:02,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:43:02,425 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:43:02,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:02,435 INFO L225 Difference]: With dead ends: 1199 [2022-01-18 15:43:02,435 INFO L226 Difference]: Without dead ends: 1188 [2022-01-18 15:43:02,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:43:02,436 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 50 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:02,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 103 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:43:02,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2022-01-18 15:43:02,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 958. [2022-01-18 15:43:02,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 4.091954022988506) internal successors, (3916), 957 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:02,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 3916 transitions. [2022-01-18 15:43:02,464 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 3916 transitions. Word has length 19 [2022-01-18 15:43:02,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:02,464 INFO L470 AbstractCegarLoop]: Abstraction has 958 states and 3916 transitions. [2022-01-18 15:43:02,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:02,465 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 3916 transitions. [2022-01-18 15:43:02,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:43:02,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:02,468 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:02,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:02,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:02,683 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:02,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:02,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1214380458, now seen corresponding path program 1 times [2022-01-18 15:43:02,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:02,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809615441] [2022-01-18 15:43:02,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:02,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:02,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:02,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:02,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:02,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809615441] [2022-01-18 15:43:02,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809615441] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:02,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517493678] [2022-01-18 15:43:02,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:02,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:02,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:02,755 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:02,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 15:43:02,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:02,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:02,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:02,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-18 15:43:02,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:02,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:03,005 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:03,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:43:03,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:03,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517493678] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:03,040 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:03,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-01-18 15:43:03,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005005348] [2022-01-18 15:43:03,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:03,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:43:03,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:03,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:43:03,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:43:03,041 INFO L87 Difference]: Start difference. First operand 958 states and 3916 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:03,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:03,473 INFO L93 Difference]: Finished difference Result 1665 states and 6652 transitions. [2022-01-18 15:43:03,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:43:03,474 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:43:03,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:03,479 INFO L225 Difference]: With dead ends: 1665 [2022-01-18 15:43:03,479 INFO L226 Difference]: Without dead ends: 1647 [2022-01-18 15:43:03,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:43:03,480 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 150 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:03,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 216 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 648 Invalid, 0 Unknown, 45 Unchecked, 0.3s Time] [2022-01-18 15:43:03,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2022-01-18 15:43:03,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1005. [2022-01-18 15:43:03,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 1004 states have (on average 4.114541832669323) internal successors, (4131), 1004 states have internal predecessors, (4131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:03,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 4131 transitions. [2022-01-18 15:43:03,512 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 4131 transitions. Word has length 19 [2022-01-18 15:43:03,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:03,512 INFO L470 AbstractCegarLoop]: Abstraction has 1005 states and 4131 transitions. [2022-01-18 15:43:03,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:03,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 4131 transitions. [2022-01-18 15:43:03,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:43:03,515 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:03,515 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:03,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-01-18 15:43:03,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-18 15:43:03,731 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:03,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:03,732 INFO L85 PathProgramCache]: Analyzing trace with hash 883922358, now seen corresponding path program 1 times [2022-01-18 15:43:03,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:03,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851992631] [2022-01-18 15:43:03,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:03,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:03,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:03,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:03,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851992631] [2022-01-18 15:43:03,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851992631] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:03,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882461885] [2022-01-18 15:43:03,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:03,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:03,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:03,814 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:03,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 15:43:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:03,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:03,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:03,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 15:43:03,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:03,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:04,024 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:04,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:43:04,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:04,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882461885] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:04,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:04,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-01-18 15:43:04,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133449732] [2022-01-18 15:43:04,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:04,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:43:04,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:04,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:43:04,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:43:04,055 INFO L87 Difference]: Start difference. First operand 1005 states and 4131 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:04,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:04,411 INFO L93 Difference]: Finished difference Result 1782 states and 7130 transitions. [2022-01-18 15:43:04,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:43:04,411 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:43:04,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:04,416 INFO L225 Difference]: With dead ends: 1782 [2022-01-18 15:43:04,416 INFO L226 Difference]: Without dead ends: 1764 [2022-01-18 15:43:04,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:43:04,417 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 198 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:04,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 193 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 521 Invalid, 0 Unknown, 26 Unchecked, 0.2s Time] [2022-01-18 15:43:04,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2022-01-18 15:43:04,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1034. [2022-01-18 15:43:04,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 4.139399806389158) internal successors, (4276), 1033 states have internal predecessors, (4276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:04,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 4276 transitions. [2022-01-18 15:43:04,443 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 4276 transitions. Word has length 19 [2022-01-18 15:43:04,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:04,443 INFO L470 AbstractCegarLoop]: Abstraction has 1034 states and 4276 transitions. [2022-01-18 15:43:04,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:04,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 4276 transitions. [2022-01-18 15:43:04,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:43:04,446 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:04,446 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:04,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:04,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-18 15:43:04,669 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:04,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:04,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1685216246, now seen corresponding path program 2 times [2022-01-18 15:43:04,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:04,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856469266] [2022-01-18 15:43:04,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:04,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:04,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:04,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:04,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856469266] [2022-01-18 15:43:04,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856469266] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:04,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518984603] [2022-01-18 15:43:04,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:43:04,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:04,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:04,745 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:04,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 15:43:04,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:43:04,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:04,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:43:04,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:04,861 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:04,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:43:04,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:04,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:05,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:05,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518984603] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:05,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:05,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-01-18 15:43:05,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189067277] [2022-01-18 15:43:05,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:05,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:43:05,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:05,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:43:05,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:43:05,110 INFO L87 Difference]: Start difference. First operand 1034 states and 4276 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:05,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:05,353 INFO L93 Difference]: Finished difference Result 1249 states and 5105 transitions. [2022-01-18 15:43:05,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:43:05,353 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:43:05,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:05,357 INFO L225 Difference]: With dead ends: 1249 [2022-01-18 15:43:05,358 INFO L226 Difference]: Without dead ends: 1240 [2022-01-18 15:43:05,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:43:05,358 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 110 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:05,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 105 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:43:05,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2022-01-18 15:43:05,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1040. [2022-01-18 15:43:05,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 4.138594802694899) internal successors, (4300), 1039 states have internal predecessors, (4300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:05,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 4300 transitions. [2022-01-18 15:43:05,396 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 4300 transitions. Word has length 19 [2022-01-18 15:43:05,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:05,396 INFO L470 AbstractCegarLoop]: Abstraction has 1040 states and 4300 transitions. [2022-01-18 15:43:05,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:05,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 4300 transitions. [2022-01-18 15:43:05,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:43:05,399 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:05,399 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:05,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:05,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 15:43:05,618 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:05,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:05,618 INFO L85 PathProgramCache]: Analyzing trace with hash -192590060, now seen corresponding path program 3 times [2022-01-18 15:43:05,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:05,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764550671] [2022-01-18 15:43:05,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:05,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:05,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:05,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:05,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764550671] [2022-01-18 15:43:05,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764550671] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:05,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111965389] [2022-01-18 15:43:05,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:43:05,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:05,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:05,691 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:05,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 15:43:05,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:43:05,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:05,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:43:05,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:05,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:05,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:43:05,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:05,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:06,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111965389] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:06,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:06,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-01-18 15:43:06,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837228589] [2022-01-18 15:43:06,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:06,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:43:06,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:06,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:43:06,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:43:06,017 INFO L87 Difference]: Start difference. First operand 1040 states and 4300 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:06,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:06,256 INFO L93 Difference]: Finished difference Result 1247 states and 5101 transitions. [2022-01-18 15:43:06,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:43:06,256 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:43:06,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:06,262 INFO L225 Difference]: With dead ends: 1247 [2022-01-18 15:43:06,262 INFO L226 Difference]: Without dead ends: 1235 [2022-01-18 15:43:06,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:43:06,263 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 86 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:06,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 127 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:43:06,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2022-01-18 15:43:06,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 1049. [2022-01-18 15:43:06,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1048 states have (on average 4.137404580152672) internal successors, (4336), 1048 states have internal predecessors, (4336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:06,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 4336 transitions. [2022-01-18 15:43:06,289 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 4336 transitions. Word has length 19 [2022-01-18 15:43:06,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:06,289 INFO L470 AbstractCegarLoop]: Abstraction has 1049 states and 4336 transitions. [2022-01-18 15:43:06,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:06,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 4336 transitions. [2022-01-18 15:43:06,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:43:06,292 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:06,292 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:06,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:06,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:06,510 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:06,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:06,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1898931946, now seen corresponding path program 2 times [2022-01-18 15:43:06,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:06,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15125028] [2022-01-18 15:43:06,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:06,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:06,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:06,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:06,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:06,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15125028] [2022-01-18 15:43:06,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15125028] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:06,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799117030] [2022-01-18 15:43:06,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:43:06,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:06,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:06,593 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:06,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 15:43:06,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:43:06,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:06,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:43:06,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:06,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:06,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:43:06,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:06,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:06,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:06,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799117030] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:06,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:06,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-01-18 15:43:06,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686937627] [2022-01-18 15:43:06,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:06,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:43:06,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:06,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:43:06,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:43:06,953 INFO L87 Difference]: Start difference. First operand 1049 states and 4336 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:07,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:07,192 INFO L93 Difference]: Finished difference Result 1276 states and 5213 transitions. [2022-01-18 15:43:07,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:43:07,193 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:43:07,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:07,197 INFO L225 Difference]: With dead ends: 1276 [2022-01-18 15:43:07,198 INFO L226 Difference]: Without dead ends: 1267 [2022-01-18 15:43:07,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:43:07,199 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 88 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:07,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 130 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:43:07,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-01-18 15:43:07,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1057. [2022-01-18 15:43:07,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1056 states have (on average 4.136363636363637) internal successors, (4368), 1056 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:07,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 4368 transitions. [2022-01-18 15:43:07,227 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 4368 transitions. Word has length 19 [2022-01-18 15:43:07,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:07,228 INFO L470 AbstractCegarLoop]: Abstraction has 1057 states and 4368 transitions. [2022-01-18 15:43:07,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:07,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 4368 transitions. [2022-01-18 15:43:07,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:43:07,230 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:07,230 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:07,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:07,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:07,443 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:07,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:07,444 INFO L85 PathProgramCache]: Analyzing trace with hash -166615788, now seen corresponding path program 3 times [2022-01-18 15:43:07,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:07,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984576600] [2022-01-18 15:43:07,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:07,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:07,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:07,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:07,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984576600] [2022-01-18 15:43:07,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984576600] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:07,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419791963] [2022-01-18 15:43:07,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:43:07,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:07,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:07,517 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:07,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 15:43:07,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:43:07,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:07,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:43:07,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:07,625 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:07,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:43:07,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:07,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:07,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:07,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419791963] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:07,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:07,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-01-18 15:43:07,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470919971] [2022-01-18 15:43:07,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:07,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:43:07,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:07,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:43:07,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:43:07,825 INFO L87 Difference]: Start difference. First operand 1057 states and 4368 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:08,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:08,012 INFO L93 Difference]: Finished difference Result 1275 states and 5211 transitions. [2022-01-18 15:43:08,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:43:08,012 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:43:08,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:08,015 INFO L225 Difference]: With dead ends: 1275 [2022-01-18 15:43:08,015 INFO L226 Difference]: Without dead ends: 1263 [2022-01-18 15:43:08,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:43:08,016 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 101 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:08,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 108 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:43:08,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2022-01-18 15:43:08,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1061. [2022-01-18 15:43:08,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 1060 states have (on average 4.1358490566037736) internal successors, (4384), 1060 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:08,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 4384 transitions. [2022-01-18 15:43:08,037 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 4384 transitions. Word has length 19 [2022-01-18 15:43:08,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:08,037 INFO L470 AbstractCegarLoop]: Abstraction has 1061 states and 4384 transitions. [2022-01-18 15:43:08,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:08,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 4384 transitions. [2022-01-18 15:43:08,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:43:08,040 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:08,040 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:08,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:08,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-01-18 15:43:08,256 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:08,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:08,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1239505502, now seen corresponding path program 4 times [2022-01-18 15:43:08,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:08,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411916033] [2022-01-18 15:43:08,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:08,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:08,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:08,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:08,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:08,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411916033] [2022-01-18 15:43:08,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411916033] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:08,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815575154] [2022-01-18 15:43:08,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:43:08,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:08,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:08,323 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:08,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 15:43:08,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:43:08,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:08,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:08,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:08,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:43:08,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:08,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:08,550 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:08,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:43:08,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:08,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815575154] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:08,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:08,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-01-18 15:43:08,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560635163] [2022-01-18 15:43:08,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:08,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:43:08,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:08,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:43:08,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:43:08,598 INFO L87 Difference]: Start difference. First operand 1061 states and 4384 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:08,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:08,857 INFO L93 Difference]: Finished difference Result 1368 states and 5540 transitions. [2022-01-18 15:43:08,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:43:08,858 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:43:08,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:08,861 INFO L225 Difference]: With dead ends: 1368 [2022-01-18 15:43:08,861 INFO L226 Difference]: Without dead ends: 1346 [2022-01-18 15:43:08,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:43:08,862 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 149 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:08,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 141 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 345 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-01-18 15:43:08,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2022-01-18 15:43:08,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 1071. [2022-01-18 15:43:08,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 1070 states have (on average 4.132710280373832) internal successors, (4422), 1070 states have internal predecessors, (4422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:08,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 4422 transitions. [2022-01-18 15:43:08,886 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 4422 transitions. Word has length 19 [2022-01-18 15:43:08,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:08,887 INFO L470 AbstractCegarLoop]: Abstraction has 1071 states and 4422 transitions. [2022-01-18 15:43:08,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:08,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 4422 transitions. [2022-01-18 15:43:08,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:43:08,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:08,889 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:08,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:09,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-01-18 15:43:09,111 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:09,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:09,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1177655488, now seen corresponding path program 5 times [2022-01-18 15:43:09,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:09,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005396638] [2022-01-18 15:43:09,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:09,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:09,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:09,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:09,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:09,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005396638] [2022-01-18 15:43:09,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005396638] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:09,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33790261] [2022-01-18 15:43:09,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:43:09,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:09,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:09,189 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:09,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 15:43:09,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:43:09,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:09,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:09,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:09,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:43:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:09,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:09,370 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:09,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:43:09,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:09,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33790261] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:09,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:09,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-01-18 15:43:09,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232728015] [2022-01-18 15:43:09,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:09,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:43:09,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:09,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:43:09,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:43:09,415 INFO L87 Difference]: Start difference. First operand 1071 states and 4422 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:09,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:09,745 INFO L93 Difference]: Finished difference Result 1366 states and 5541 transitions. [2022-01-18 15:43:09,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:43:09,745 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:43:09,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:09,752 INFO L225 Difference]: With dead ends: 1366 [2022-01-18 15:43:09,752 INFO L226 Difference]: Without dead ends: 1351 [2022-01-18 15:43:09,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:43:09,754 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 110 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:09,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 173 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 457 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2022-01-18 15:43:09,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2022-01-18 15:43:09,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1080. [2022-01-18 15:43:09,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1079 states have (on average 4.137164040778498) internal successors, (4464), 1079 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:09,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 4464 transitions. [2022-01-18 15:43:09,783 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 4464 transitions. Word has length 19 [2022-01-18 15:43:09,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:09,783 INFO L470 AbstractCegarLoop]: Abstraction has 1080 states and 4464 transitions. [2022-01-18 15:43:09,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:09,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 4464 transitions. [2022-01-18 15:43:09,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:43:09,785 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:09,786 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:09,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:09,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:09,999 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:10,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:10,000 INFO L85 PathProgramCache]: Analyzing trace with hash -430659694, now seen corresponding path program 6 times [2022-01-18 15:43:10,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:10,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963589683] [2022-01-18 15:43:10,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:10,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:10,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:10,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:10,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963589683] [2022-01-18 15:43:10,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963589683] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:10,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105317434] [2022-01-18 15:43:10,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:43:10,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:10,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:10,071 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:10,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 15:43:10,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:43:10,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:10,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:43:10,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:10,155 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:10,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 15:43:10,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:10,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:10,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:10,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105317434] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:10,313 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:10,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-01-18 15:43:10,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046654157] [2022-01-18 15:43:10,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:10,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:43:10,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:10,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:43:10,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:43:10,314 INFO L87 Difference]: Start difference. First operand 1080 states and 4464 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:10,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:10,554 INFO L93 Difference]: Finished difference Result 1366 states and 5546 transitions. [2022-01-18 15:43:10,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:43:10,554 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:43:10,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:10,556 INFO L225 Difference]: With dead ends: 1366 [2022-01-18 15:43:10,556 INFO L226 Difference]: Without dead ends: 1351 [2022-01-18 15:43:10,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:43:10,557 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 107 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:10,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 155 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:43:10,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2022-01-18 15:43:10,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1092. [2022-01-18 15:43:10,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1091 states have (on average 4.139321723189735) internal successors, (4516), 1091 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:10,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 4516 transitions. [2022-01-18 15:43:10,575 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 4516 transitions. Word has length 19 [2022-01-18 15:43:10,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:10,575 INFO L470 AbstractCegarLoop]: Abstraction has 1092 states and 4516 transitions. [2022-01-18 15:43:10,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:10,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 4516 transitions. [2022-01-18 15:43:10,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:43:10,577 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:10,577 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:10,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-01-18 15:43:10,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:10,777 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:10,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:10,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1884927084, now seen corresponding path program 4 times [2022-01-18 15:43:10,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:10,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566305105] [2022-01-18 15:43:10,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:10,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:10,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:10,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:10,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:10,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566305105] [2022-01-18 15:43:10,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566305105] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:10,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386929101] [2022-01-18 15:43:10,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:43:10,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:10,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:10,845 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:10,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 15:43:10,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:43:10,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:10,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 15:43:10,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:10,913 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:10,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-18 15:43:10,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:10,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:11,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:11,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386929101] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:11,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:11,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-01-18 15:43:11,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585540797] [2022-01-18 15:43:11,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:11,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:43:11,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:11,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:43:11,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:43:11,092 INFO L87 Difference]: Start difference. First operand 1092 states and 4516 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:11,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:11,234 INFO L93 Difference]: Finished difference Result 1303 states and 5318 transitions. [2022-01-18 15:43:11,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:43:11,235 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:43:11,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:11,238 INFO L225 Difference]: With dead ends: 1303 [2022-01-18 15:43:11,238 INFO L226 Difference]: Without dead ends: 1279 [2022-01-18 15:43:11,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:43:11,239 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 94 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:11,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 78 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:43:11,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2022-01-18 15:43:11,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1105. [2022-01-18 15:43:11,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1104 states have (on average 4.134963768115942) internal successors, (4565), 1104 states have internal predecessors, (4565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:11,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 4565 transitions. [2022-01-18 15:43:11,255 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 4565 transitions. Word has length 19 [2022-01-18 15:43:11,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:11,255 INFO L470 AbstractCegarLoop]: Abstraction has 1105 states and 4565 transitions. [2022-01-18 15:43:11,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:11,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 4565 transitions. [2022-01-18 15:43:11,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:43:11,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:11,257 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:11,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:11,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-01-18 15:43:11,458 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:11,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:11,458 INFO L85 PathProgramCache]: Analyzing trace with hash -152610926, now seen corresponding path program 5 times [2022-01-18 15:43:11,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:11,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805961643] [2022-01-18 15:43:11,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:11,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:11,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:11,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:11,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805961643] [2022-01-18 15:43:11,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805961643] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:11,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042528159] [2022-01-18 15:43:11,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:43:11,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:11,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:11,534 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:11,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 15:43:11,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:43:11,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:11,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:11,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:11,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:43:11,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:11,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:11,744 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:11,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:43:11,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:11,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042528159] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:11,793 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:11,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-01-18 15:43:11,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510992552] [2022-01-18 15:43:11,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:11,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:43:11,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:11,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:43:11,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:43:11,794 INFO L87 Difference]: Start difference. First operand 1105 states and 4565 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:12,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:12,081 INFO L93 Difference]: Finished difference Result 1433 states and 5804 transitions. [2022-01-18 15:43:12,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:43:12,082 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:43:12,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:12,085 INFO L225 Difference]: With dead ends: 1433 [2022-01-18 15:43:12,085 INFO L226 Difference]: Without dead ends: 1416 [2022-01-18 15:43:12,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:43:12,085 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 131 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:12,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 162 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 436 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2022-01-18 15:43:12,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2022-01-18 15:43:12,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 1109. [2022-01-18 15:43:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1109 states, 1108 states have (on average 4.134476534296029) internal successors, (4581), 1108 states have internal predecessors, (4581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:12,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 4581 transitions. [2022-01-18 15:43:12,104 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 4581 transitions. Word has length 19 [2022-01-18 15:43:12,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:12,104 INFO L470 AbstractCegarLoop]: Abstraction has 1109 states and 4581 transitions. [2022-01-18 15:43:12,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:12,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 4581 transitions. [2022-01-18 15:43:12,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:43:12,106 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:12,106 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:12,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-01-18 15:43:12,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-18 15:43:12,306 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:12,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:12,307 INFO L85 PathProgramCache]: Analyzing trace with hash 2035572250, now seen corresponding path program 6 times [2022-01-18 15:43:12,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:12,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290526253] [2022-01-18 15:43:12,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:12,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:12,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:12,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290526253] [2022-01-18 15:43:12,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290526253] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:12,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369603639] [2022-01-18 15:43:12,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:43:12,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:12,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:12,380 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:12,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 15:43:12,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:43:12,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:12,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 15:43:12,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:12,479 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:12,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-01-18 15:43:12,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:12,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:12,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:12,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369603639] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:12,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:12,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-01-18 15:43:12,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287111343] [2022-01-18 15:43:12,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:12,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:43:12,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:12,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:43:12,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:43:12,676 INFO L87 Difference]: Start difference. First operand 1109 states and 4581 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:13,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:13,071 INFO L93 Difference]: Finished difference Result 1751 states and 7027 transitions. [2022-01-18 15:43:13,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:43:13,071 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:43:13,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:13,075 INFO L225 Difference]: With dead ends: 1751 [2022-01-18 15:43:13,075 INFO L226 Difference]: Without dead ends: 1717 [2022-01-18 15:43:13,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:43:13,075 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 199 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:13,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 160 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:43:13,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2022-01-18 15:43:13,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1143. [2022-01-18 15:43:13,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1142 states have (on average 4.158493870402802) internal successors, (4749), 1142 states have internal predecessors, (4749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:13,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 4749 transitions. [2022-01-18 15:43:13,105 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 4749 transitions. Word has length 19 [2022-01-18 15:43:13,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:13,105 INFO L470 AbstractCegarLoop]: Abstraction has 1143 states and 4749 transitions. [2022-01-18 15:43:13,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:13,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 4749 transitions. [2022-01-18 15:43:13,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:43:13,108 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:13,108 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:13,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-01-18 15:43:13,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 15:43:13,330 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:13,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:13,330 INFO L85 PathProgramCache]: Analyzing trace with hash 2067340975, now seen corresponding path program 7 times [2022-01-18 15:43:13,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:13,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183507311] [2022-01-18 15:43:13,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:13,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:13,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:13,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:13,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:13,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183507311] [2022-01-18 15:43:13,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183507311] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:13,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544342960] [2022-01-18 15:43:13,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:43:13,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:13,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:13,355 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:13,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 15:43:13,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:13,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:43:13,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:13,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:13,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:13,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:13,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544342960] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:13,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:13,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-01-18 15:43:13,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366700259] [2022-01-18 15:43:13,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:13,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 15:43:13,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:13,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 15:43:13,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 15:43:13,471 INFO L87 Difference]: Start difference. First operand 1143 states and 4749 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:13,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:13,541 INFO L93 Difference]: Finished difference Result 2141 states and 8584 transitions. [2022-01-18 15:43:13,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:43:13,541 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:43:13,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:13,546 INFO L225 Difference]: With dead ends: 2141 [2022-01-18 15:43:13,546 INFO L226 Difference]: Without dead ends: 2077 [2022-01-18 15:43:13,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-18 15:43:13,546 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 117 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:13,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 80 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:43:13,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2022-01-18 15:43:13,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 1697. [2022-01-18 15:43:13,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1696 states have (on average 4.147405660377358) internal successors, (7034), 1696 states have internal predecessors, (7034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:13,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 7034 transitions. [2022-01-18 15:43:13,578 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 7034 transitions. Word has length 21 [2022-01-18 15:43:13,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:13,579 INFO L470 AbstractCegarLoop]: Abstraction has 1697 states and 7034 transitions. [2022-01-18 15:43:13,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:13,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 7034 transitions. [2022-01-18 15:43:13,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:43:13,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:13,583 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:13,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:13,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-18 15:43:13,799 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:13,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:13,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1150453651, now seen corresponding path program 8 times [2022-01-18 15:43:13,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:13,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382346346] [2022-01-18 15:43:13,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:13,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:13,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:13,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:13,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:13,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382346346] [2022-01-18 15:43:13,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382346346] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:13,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774557940] [2022-01-18 15:43:13,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:43:13,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:13,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:13,832 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:13,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 15:43:13,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:43:13,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:13,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:43:13,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:13,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:13,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-18 15:43:13,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774557940] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:43:13,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-18 15:43:13,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-01-18 15:43:13,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885392773] [2022-01-18 15:43:13,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:43:13,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:43:13,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:13,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:43:13,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-18 15:43:13,911 INFO L87 Difference]: Start difference. First operand 1697 states and 7034 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:13,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:13,966 INFO L93 Difference]: Finished difference Result 2538 states and 10335 transitions. [2022-01-18 15:43:13,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:43:13,966 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:43:13,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:13,971 INFO L225 Difference]: With dead ends: 2538 [2022-01-18 15:43:13,971 INFO L226 Difference]: Without dead ends: 2465 [2022-01-18 15:43:13,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-18 15:43:13,972 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:13,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 46 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:43:13,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2022-01-18 15:43:13,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 1876. [2022-01-18 15:43:13,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 4.088533333333333) internal successors, (7666), 1875 states have internal predecessors, (7666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:14,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 7666 transitions. [2022-01-18 15:43:14,003 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 7666 transitions. Word has length 21 [2022-01-18 15:43:14,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:14,003 INFO L470 AbstractCegarLoop]: Abstraction has 1876 states and 7666 transitions. [2022-01-18 15:43:14,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:14,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 7666 transitions. [2022-01-18 15:43:14,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 15:43:14,006 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:14,006 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:14,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:14,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 15:43:14,207 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:14,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:14,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1018597773, now seen corresponding path program 9 times [2022-01-18 15:43:14,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:14,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203327226] [2022-01-18 15:43:14,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:14,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:43:14,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:14,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203327226] [2022-01-18 15:43:14,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203327226] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:14,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428407134] [2022-01-18 15:43:14,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:43:14,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:14,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:14,232 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:14,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 15:43:14,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:43:14,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:14,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 15:43:14,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:14,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:14,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:14,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428407134] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:14,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:14,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 8 [2022-01-18 15:43:14,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307798588] [2022-01-18 15:43:14,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:14,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 15:43:14,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:14,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 15:43:14,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-18 15:43:14,340 INFO L87 Difference]: Start difference. First operand 1876 states and 7666 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:14,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:14,459 INFO L93 Difference]: Finished difference Result 2927 states and 11711 transitions. [2022-01-18 15:43:14,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:43:14,459 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 15:43:14,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:14,465 INFO L225 Difference]: With dead ends: 2927 [2022-01-18 15:43:14,465 INFO L226 Difference]: Without dead ends: 2912 [2022-01-18 15:43:14,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-01-18 15:43:14,466 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 109 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:14,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 114 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:43:14,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2912 states. [2022-01-18 15:43:14,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2912 to 2499. [2022-01-18 15:43:14,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2499 states, 2498 states have (on average 4.125700560448359) internal successors, (10306), 2498 states have internal predecessors, (10306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:14,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2499 states to 2499 states and 10306 transitions. [2022-01-18 15:43:14,510 INFO L78 Accepts]: Start accepts. Automaton has 2499 states and 10306 transitions. Word has length 21 [2022-01-18 15:43:14,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:14,511 INFO L470 AbstractCegarLoop]: Abstraction has 2499 states and 10306 transitions. [2022-01-18 15:43:14,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:14,511 INFO L276 IsEmpty]: Start isEmpty. Operand 2499 states and 10306 transitions. [2022-01-18 15:43:14,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:43:14,515 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:14,515 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:14,531 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-01-18 15:43:14,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:14,718 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:14,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:14,719 INFO L85 PathProgramCache]: Analyzing trace with hash -430491024, now seen corresponding path program 10 times [2022-01-18 15:43:14,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:14,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100571534] [2022-01-18 15:43:14,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:14,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:14,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:14,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:14,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100571534] [2022-01-18 15:43:14,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100571534] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:14,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543457566] [2022-01-18 15:43:14,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:43:14,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:14,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:14,942 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:14,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 15:43:14,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:43:14,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:14,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:43:14,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:15,144 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:15,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2022-01-18 15:43:15,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:15,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:15,809 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:15,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 42 [2022-01-18 15:43:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:15,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543457566] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:15,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:15,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-01-18 15:43:15,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159294420] [2022-01-18 15:43:15,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:15,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:43:15,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:15,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:43:15,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:43:15,980 INFO L87 Difference]: Start difference. First operand 2499 states and 10306 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:16,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:16,755 INFO L93 Difference]: Finished difference Result 2830 states and 11592 transitions. [2022-01-18 15:43:16,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:43:16,755 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:43:16,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:16,762 INFO L225 Difference]: With dead ends: 2830 [2022-01-18 15:43:16,762 INFO L226 Difference]: Without dead ends: 2825 [2022-01-18 15:43:16,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=185, Invalid=1147, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:43:16,763 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 177 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:16,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 577 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1140 Invalid, 0 Unknown, 230 Unchecked, 0.5s Time] [2022-01-18 15:43:16,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2825 states. [2022-01-18 15:43:16,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2825 to 2546. [2022-01-18 15:43:16,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2546 states, 2545 states have (on average 4.137917485265226) internal successors, (10531), 2545 states have internal predecessors, (10531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:16,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 10531 transitions. [2022-01-18 15:43:16,801 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 10531 transitions. Word has length 23 [2022-01-18 15:43:16,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:16,802 INFO L470 AbstractCegarLoop]: Abstraction has 2546 states and 10531 transitions. [2022-01-18 15:43:16,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:16,802 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 10531 transitions. [2022-01-18 15:43:16,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:43:16,807 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:16,807 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:16,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:17,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-01-18 15:43:17,008 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:17,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:17,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1828320050, now seen corresponding path program 11 times [2022-01-18 15:43:17,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:17,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091773024] [2022-01-18 15:43:17,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:17,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:17,067 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:17,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:17,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091773024] [2022-01-18 15:43:17,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091773024] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:17,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248678336] [2022-01-18 15:43:17,067 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:43:17,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:17,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:17,069 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:17,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 15:43:17,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:43:17,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:17,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 15:43:17,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:17,165 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:17,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:17,235 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:17,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248678336] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:17,236 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:17,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-01-18 15:43:17,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312117801] [2022-01-18 15:43:17,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:17,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 15:43:17,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:17,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 15:43:17,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-01-18 15:43:17,237 INFO L87 Difference]: Start difference. First operand 2546 states and 10531 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:17,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:17,383 INFO L93 Difference]: Finished difference Result 4295 states and 17292 transitions. [2022-01-18 15:43:17,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:43:17,383 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:43:17,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:17,392 INFO L225 Difference]: With dead ends: 4295 [2022-01-18 15:43:17,392 INFO L226 Difference]: Without dead ends: 3970 [2022-01-18 15:43:17,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:43:17,393 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 126 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:17,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 149 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:43:17,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3970 states. [2022-01-18 15:43:17,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3970 to 2547. [2022-01-18 15:43:17,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2547 states, 2546 states have (on average 4.129615082482325) internal successors, (10514), 2546 states have internal predecessors, (10514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:17,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2547 states to 2547 states and 10514 transitions. [2022-01-18 15:43:17,446 INFO L78 Accepts]: Start accepts. Automaton has 2547 states and 10514 transitions. Word has length 23 [2022-01-18 15:43:17,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:17,446 INFO L470 AbstractCegarLoop]: Abstraction has 2547 states and 10514 transitions. [2022-01-18 15:43:17,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:17,446 INFO L276 IsEmpty]: Start isEmpty. Operand 2547 states and 10514 transitions. [2022-01-18 15:43:17,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:43:17,451 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:17,451 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:17,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-01-18 15:43:17,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:17,651 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:17,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:17,652 INFO L85 PathProgramCache]: Analyzing trace with hash -565278928, now seen corresponding path program 12 times [2022-01-18 15:43:17,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:17,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158928710] [2022-01-18 15:43:17,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:17,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:17,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:17,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:17,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:17,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158928710] [2022-01-18 15:43:17,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158928710] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:17,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409275283] [2022-01-18 15:43:17,833 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:43:17,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:17,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:17,834 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:17,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 15:43:17,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:43:17,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:17,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:43:17,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:18,078 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:18,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2022-01-18 15:43:18,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:18,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:18,646 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:18,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 42 [2022-01-18 15:43:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:18,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409275283] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:18,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:18,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-01-18 15:43:18,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105831862] [2022-01-18 15:43:18,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:18,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:43:18,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:18,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:43:18,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:43:18,793 INFO L87 Difference]: Start difference. First operand 2547 states and 10514 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:19,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:19,642 INFO L93 Difference]: Finished difference Result 3014 states and 12349 transitions. [2022-01-18 15:43:19,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:43:19,643 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:43:19,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:19,649 INFO L225 Difference]: With dead ends: 3014 [2022-01-18 15:43:19,649 INFO L226 Difference]: Without dead ends: 2992 [2022-01-18 15:43:19,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=221, Invalid=1339, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:43:19,650 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 187 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 1436 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 1746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:19,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 749 Invalid, 1746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1436 Invalid, 0 Unknown, 239 Unchecked, 0.6s Time] [2022-01-18 15:43:19,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2022-01-18 15:43:19,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 2575. [2022-01-18 15:43:19,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2575 states, 2574 states have (on average 4.134421134421134) internal successors, (10642), 2574 states have internal predecessors, (10642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:19,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 10642 transitions. [2022-01-18 15:43:19,737 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 10642 transitions. Word has length 23 [2022-01-18 15:43:19,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:19,738 INFO L470 AbstractCegarLoop]: Abstraction has 2575 states and 10642 transitions. [2022-01-18 15:43:19,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:19,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 10642 transitions. [2022-01-18 15:43:19,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:43:19,744 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:19,744 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:19,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:19,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:19,964 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:19,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:19,965 INFO L85 PathProgramCache]: Analyzing trace with hash 20055024, now seen corresponding path program 13 times [2022-01-18 15:43:19,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:19,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293985761] [2022-01-18 15:43:19,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:19,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:19,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:20,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:20,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:20,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293985761] [2022-01-18 15:43:20,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293985761] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:20,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491627825] [2022-01-18 15:43:20,163 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:43:20,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:20,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:20,164 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:20,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 15:43:20,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:20,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:43:20,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:20,336 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:20,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:43:20,753 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:20,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:20,940 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:20,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 42 [2022-01-18 15:43:21,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:21,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491627825] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:21,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:21,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-01-18 15:43:21,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47088728] [2022-01-18 15:43:21,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:21,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:43:21,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:21,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:43:21,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:43:21,030 INFO L87 Difference]: Start difference. First operand 2575 states and 10642 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:22,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:22,117 INFO L93 Difference]: Finished difference Result 3169 states and 12922 transitions. [2022-01-18 15:43:22,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:43:22,118 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:43:22,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:22,124 INFO L225 Difference]: With dead ends: 3169 [2022-01-18 15:43:22,125 INFO L226 Difference]: Without dead ends: 3117 [2022-01-18 15:43:22,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=322, Invalid=1840, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 15:43:22,125 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 256 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 1755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 415 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:22,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 655 Invalid, 1755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1234 Invalid, 0 Unknown, 415 Unchecked, 0.5s Time] [2022-01-18 15:43:22,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3117 states. [2022-01-18 15:43:22,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3117 to 2607. [2022-01-18 15:43:22,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2607 states, 2606 states have (on average 4.13584036838066) internal successors, (10778), 2606 states have internal predecessors, (10778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:22,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2607 states to 2607 states and 10778 transitions. [2022-01-18 15:43:22,166 INFO L78 Accepts]: Start accepts. Automaton has 2607 states and 10778 transitions. Word has length 23 [2022-01-18 15:43:22,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:22,166 INFO L470 AbstractCegarLoop]: Abstraction has 2607 states and 10778 transitions. [2022-01-18 15:43:22,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:22,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2607 states and 10778 transitions. [2022-01-18 15:43:22,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:43:22,171 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:22,171 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:22,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:22,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-01-18 15:43:22,371 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:22,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:22,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1633621758, now seen corresponding path program 14 times [2022-01-18 15:43:22,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:22,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872838247] [2022-01-18 15:43:22,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:22,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:22,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:22,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:22,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872838247] [2022-01-18 15:43:22,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872838247] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:22,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239397916] [2022-01-18 15:43:22,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:43:22,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:22,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:22,605 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:22,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 15:43:22,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:43:22,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:22,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:43:22,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:22,773 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:22,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:43:23,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:23,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:23,408 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:23,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 42 [2022-01-18 15:43:23,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:23,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239397916] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:23,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:23,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-01-18 15:43:23,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422824200] [2022-01-18 15:43:23,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:23,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:43:23,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:23,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:43:23,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:43:23,514 INFO L87 Difference]: Start difference. First operand 2607 states and 10778 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:24,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:24,516 INFO L93 Difference]: Finished difference Result 3007 states and 12324 transitions. [2022-01-18 15:43:24,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:43:24,516 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:43:24,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:24,522 INFO L225 Difference]: With dead ends: 3007 [2022-01-18 15:43:24,522 INFO L226 Difference]: Without dead ends: 2986 [2022-01-18 15:43:24,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=281, Invalid=1441, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:43:24,523 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 225 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 1460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 338 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:24,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 567 Invalid, 1460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1035 Invalid, 0 Unknown, 338 Unchecked, 0.5s Time] [2022-01-18 15:43:24,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2986 states. [2022-01-18 15:43:24,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2986 to 2611. [2022-01-18 15:43:24,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2611 states, 2610 states have (on average 4.135632183908046) internal successors, (10794), 2610 states have internal predecessors, (10794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:24,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2611 states to 2611 states and 10794 transitions. [2022-01-18 15:43:24,580 INFO L78 Accepts]: Start accepts. Automaton has 2611 states and 10794 transitions. Word has length 23 [2022-01-18 15:43:24,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:24,580 INFO L470 AbstractCegarLoop]: Abstraction has 2611 states and 10794 transitions. [2022-01-18 15:43:24,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:24,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2611 states and 10794 transitions. [2022-01-18 15:43:24,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:43:24,586 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:24,586 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:24,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:24,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-01-18 15:43:24,791 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:24,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:24,792 INFO L85 PathProgramCache]: Analyzing trace with hash -410841410, now seen corresponding path program 15 times [2022-01-18 15:43:24,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:24,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186558723] [2022-01-18 15:43:24,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:24,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:24,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:24,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:24,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:24,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186558723] [2022-01-18 15:43:24,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186558723] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:24,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253055833] [2022-01-18 15:43:24,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:43:24,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:24,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:24,999 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:25,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 15:43:25,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:43:25,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:25,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:43:25,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:25,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:25,280 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 15:43:25,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 58 [2022-01-18 15:43:25,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:25,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:25,624 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 15:43:25,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2022-01-18 15:43:25,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:25,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253055833] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:25,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:25,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2022-01-18 15:43:25,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126828903] [2022-01-18 15:43:25,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:25,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:43:25,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:25,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:43:25,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:43:25,696 INFO L87 Difference]: Start difference. First operand 2611 states and 10794 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:27,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:27,114 INFO L93 Difference]: Finished difference Result 3670 states and 14922 transitions. [2022-01-18 15:43:27,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 15:43:27,114 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:43:27,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:27,122 INFO L225 Difference]: With dead ends: 3670 [2022-01-18 15:43:27,122 INFO L226 Difference]: Without dead ends: 3632 [2022-01-18 15:43:27,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=376, Invalid=2380, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 15:43:27,123 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 340 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 1636 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:27,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 761 Invalid, 1855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1636 Invalid, 0 Unknown, 49 Unchecked, 0.8s Time] [2022-01-18 15:43:27,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3632 states. [2022-01-18 15:43:27,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3632 to 2646. [2022-01-18 15:43:27,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2646 states, 2645 states have (on average 4.141776937618148) internal successors, (10955), 2645 states have internal predecessors, (10955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:27,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2646 states to 2646 states and 10955 transitions. [2022-01-18 15:43:27,168 INFO L78 Accepts]: Start accepts. Automaton has 2646 states and 10955 transitions. Word has length 23 [2022-01-18 15:43:27,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:27,168 INFO L470 AbstractCegarLoop]: Abstraction has 2646 states and 10955 transitions. [2022-01-18 15:43:27,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:27,168 INFO L276 IsEmpty]: Start isEmpty. Operand 2646 states and 10955 transitions. [2022-01-18 15:43:27,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:43:27,173 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:27,173 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:27,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-01-18 15:43:27,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-18 15:43:27,374 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:27,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:27,374 INFO L85 PathProgramCache]: Analyzing trace with hash 778537524, now seen corresponding path program 16 times [2022-01-18 15:43:27,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:27,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090274550] [2022-01-18 15:43:27,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:27,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:27,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:27,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:27,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:27,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090274550] [2022-01-18 15:43:27,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090274550] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:27,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315315707] [2022-01-18 15:43:27,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:43:27,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:27,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:27,536 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:27,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 15:43:27,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:43:27,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:27,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:43:27,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:27,731 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:27,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:43:28,124 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:28,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:28,279 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:28,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:43:28,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:28,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:43:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:28,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315315707] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:28,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:28,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:43:28,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970175584] [2022-01-18 15:43:28,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:28,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:43:28,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:28,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:43:28,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:43:28,346 INFO L87 Difference]: Start difference. First operand 2646 states and 10955 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:29,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:29,258 INFO L93 Difference]: Finished difference Result 3374 states and 13760 transitions. [2022-01-18 15:43:29,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:43:29,259 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:43:29,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:29,266 INFO L225 Difference]: With dead ends: 3374 [2022-01-18 15:43:29,266 INFO L226 Difference]: Without dead ends: 3344 [2022-01-18 15:43:29,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=187, Invalid=1073, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:43:29,267 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 208 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 1618 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 1766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:29,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 673 Invalid, 1766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1618 Invalid, 0 Unknown, 103 Unchecked, 0.6s Time] [2022-01-18 15:43:29,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3344 states. [2022-01-18 15:43:29,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3344 to 2658. [2022-01-18 15:43:29,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2658 states, 2657 states have (on average 4.144523899134362) internal successors, (11012), 2657 states have internal predecessors, (11012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:29,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2658 states to 2658 states and 11012 transitions. [2022-01-18 15:43:29,316 INFO L78 Accepts]: Start accepts. Automaton has 2658 states and 11012 transitions. Word has length 23 [2022-01-18 15:43:29,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:29,316 INFO L470 AbstractCegarLoop]: Abstraction has 2658 states and 11012 transitions. [2022-01-18 15:43:29,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:29,316 INFO L276 IsEmpty]: Start isEmpty. Operand 2658 states and 11012 transitions. [2022-01-18 15:43:29,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:43:29,323 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:29,323 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:29,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-01-18 15:43:29,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:29,527 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:29,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:29,528 INFO L85 PathProgramCache]: Analyzing trace with hash 859936580, now seen corresponding path program 17 times [2022-01-18 15:43:29,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:29,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042797761] [2022-01-18 15:43:29,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:29,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:29,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:29,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:29,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:29,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042797761] [2022-01-18 15:43:29,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042797761] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:29,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427564837] [2022-01-18 15:43:29,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:43:29,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:29,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:29,694 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:29,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 15:43:29,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:43:29,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:29,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:43:29,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:29,899 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:29,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:43:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:30,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:30,487 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:30,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:43:30,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:30,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:43:30,553 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:30,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427564837] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:30,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:30,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:43:30,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829665089] [2022-01-18 15:43:30,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:30,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:43:30,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:30,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:43:30,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:43:30,555 INFO L87 Difference]: Start difference. First operand 2658 states and 11012 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:31,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:31,503 INFO L93 Difference]: Finished difference Result 3371 states and 13742 transitions. [2022-01-18 15:43:31,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:43:31,503 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:43:31,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:31,510 INFO L225 Difference]: With dead ends: 3371 [2022-01-18 15:43:31,510 INFO L226 Difference]: Without dead ends: 3319 [2022-01-18 15:43:31,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=245, Invalid=1237, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:43:31,511 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 275 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 1504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:31,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 507 Invalid, 1504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1183 Invalid, 0 Unknown, 225 Unchecked, 0.5s Time] [2022-01-18 15:43:31,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2022-01-18 15:43:31,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 2662. [2022-01-18 15:43:31,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2662 states, 2661 states have (on average 4.145058248778654) internal successors, (11030), 2661 states have internal predecessors, (11030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:31,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 11030 transitions. [2022-01-18 15:43:31,570 INFO L78 Accepts]: Start accepts. Automaton has 2662 states and 11030 transitions. Word has length 23 [2022-01-18 15:43:31,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:31,570 INFO L470 AbstractCegarLoop]: Abstraction has 2662 states and 11030 transitions. [2022-01-18 15:43:31,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:31,570 INFO L276 IsEmpty]: Start isEmpty. Operand 2662 states and 11030 transitions. [2022-01-18 15:43:31,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:43:31,575 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:31,575 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:31,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:31,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-01-18 15:43:31,780 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:31,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:31,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1821463982, now seen corresponding path program 18 times [2022-01-18 15:43:31,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:31,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932867939] [2022-01-18 15:43:31,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:31,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:31,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:31,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:31,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:31,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932867939] [2022-01-18 15:43:31,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932867939] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:31,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606977646] [2022-01-18 15:43:31,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:43:31,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:31,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:31,954 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:31,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 15:43:31,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:43:31,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:31,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:43:31,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:32,123 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:32,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:43:32,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:32,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:32,710 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:32,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:43:32,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:32,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:43:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:32,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606977646] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:32,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:32,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:43:32,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225760692] [2022-01-18 15:43:32,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:32,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:43:32,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:32,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:43:32,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:43:32,770 INFO L87 Difference]: Start difference. First operand 2662 states and 11030 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:33,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:33,587 INFO L93 Difference]: Finished difference Result 3324 states and 13572 transitions. [2022-01-18 15:43:33,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:43:33,588 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:43:33,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:33,595 INFO L225 Difference]: With dead ends: 3324 [2022-01-18 15:43:33,596 INFO L226 Difference]: Without dead ends: 3282 [2022-01-18 15:43:33,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=206, Invalid=1054, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:43:33,596 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 245 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:33,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 522 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 966 Invalid, 0 Unknown, 71 Unchecked, 0.4s Time] [2022-01-18 15:43:33,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2022-01-18 15:43:33,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 2662. [2022-01-18 15:43:33,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2662 states, 2661 states have (on average 4.145058248778654) internal successors, (11030), 2661 states have internal predecessors, (11030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:33,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 11030 transitions. [2022-01-18 15:43:33,643 INFO L78 Accepts]: Start accepts. Automaton has 2662 states and 11030 transitions. Word has length 23 [2022-01-18 15:43:33,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:33,643 INFO L470 AbstractCegarLoop]: Abstraction has 2662 states and 11030 transitions. [2022-01-18 15:43:33,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:33,643 INFO L276 IsEmpty]: Start isEmpty. Operand 2662 states and 11030 transitions. [2022-01-18 15:43:33,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:43:33,648 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:33,648 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:33,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:33,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-18 15:43:33,849 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:33,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:33,849 INFO L85 PathProgramCache]: Analyzing trace with hash -612794448, now seen corresponding path program 19 times [2022-01-18 15:43:33,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:33,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904560925] [2022-01-18 15:43:33,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:33,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:33,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:34,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:34,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:34,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904560925] [2022-01-18 15:43:34,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904560925] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:34,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024536670] [2022-01-18 15:43:34,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:43:34,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:34,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:34,054 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:34,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 15:43:34,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:34,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:43:34,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:34,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:34,359 INFO L353 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2022-01-18 15:43:34,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 74 [2022-01-18 15:43:34,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:34,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:34,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:34,959 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:34,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 30 [2022-01-18 15:43:35,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:35,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024536670] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:35,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:35,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2022-01-18 15:43:35,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781241097] [2022-01-18 15:43:35,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:35,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:43:35,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:35,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:43:35,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:43:35,039 INFO L87 Difference]: Start difference. First operand 2662 states and 11030 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:35,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:35,860 INFO L93 Difference]: Finished difference Result 3196 states and 13065 transitions. [2022-01-18 15:43:35,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 15:43:35,861 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:43:35,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:35,868 INFO L225 Difference]: With dead ends: 3196 [2022-01-18 15:43:35,868 INFO L226 Difference]: Without dead ends: 3145 [2022-01-18 15:43:35,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=315, Invalid=1941, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 15:43:35,869 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 216 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:35,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 709 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 391 Invalid, 0 Unknown, 274 Unchecked, 0.2s Time] [2022-01-18 15:43:35,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3145 states. [2022-01-18 15:43:35,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3145 to 2710. [2022-01-18 15:43:35,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2710 states, 2709 states have (on average 4.152823920265781) internal successors, (11250), 2709 states have internal predecessors, (11250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:35,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2710 states to 2710 states and 11250 transitions. [2022-01-18 15:43:35,912 INFO L78 Accepts]: Start accepts. Automaton has 2710 states and 11250 transitions. Word has length 23 [2022-01-18 15:43:35,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:35,912 INFO L470 AbstractCegarLoop]: Abstraction has 2710 states and 11250 transitions. [2022-01-18 15:43:35,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:35,912 INFO L276 IsEmpty]: Start isEmpty. Operand 2710 states and 11250 transitions. [2022-01-18 15:43:35,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:43:35,918 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:35,918 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:35,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-01-18 15:43:36,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-18 15:43:36,126 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:36,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:36,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1876090544, now seen corresponding path program 20 times [2022-01-18 15:43:36,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:36,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079558523] [2022-01-18 15:43:36,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:36,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:36,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:36,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:36,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079558523] [2022-01-18 15:43:36,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079558523] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:36,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061507314] [2022-01-18 15:43:36,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:43:36,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:36,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:36,334 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:36,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 15:43:36,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:43:36,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:36,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:43:36,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:36,508 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:36,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 52 [2022-01-18 15:43:36,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:36,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:36,788 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:36,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 45 [2022-01-18 15:43:36,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:36,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061507314] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:36,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:36,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-01-18 15:43:36,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312399748] [2022-01-18 15:43:36,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:36,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:43:36,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:36,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:43:36,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:43:36,854 INFO L87 Difference]: Start difference. First operand 2710 states and 11250 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:37,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:37,504 INFO L93 Difference]: Finished difference Result 3030 states and 12473 transitions. [2022-01-18 15:43:37,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:43:37,504 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:43:37,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:37,510 INFO L225 Difference]: With dead ends: 3030 [2022-01-18 15:43:37,510 INFO L226 Difference]: Without dead ends: 3011 [2022-01-18 15:43:37,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=286, Invalid=1120, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:43:37,511 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 217 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 532 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:37,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 364 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 654 Invalid, 0 Unknown, 532 Unchecked, 0.3s Time] [2022-01-18 15:43:37,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3011 states. [2022-01-18 15:43:37,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3011 to 2718. [2022-01-18 15:43:37,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2718 states, 2717 states have (on average 4.15311004784689) internal successors, (11284), 2717 states have internal predecessors, (11284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:37,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2718 states to 2718 states and 11284 transitions. [2022-01-18 15:43:37,551 INFO L78 Accepts]: Start accepts. Automaton has 2718 states and 11284 transitions. Word has length 23 [2022-01-18 15:43:37,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:37,552 INFO L470 AbstractCegarLoop]: Abstraction has 2718 states and 11284 transitions. [2022-01-18 15:43:37,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:37,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2718 states and 11284 transitions. [2022-01-18 15:43:37,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:43:37,558 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:37,558 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:37,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-01-18 15:43:37,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-01-18 15:43:37,761 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:37,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:37,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1586106238, now seen corresponding path program 21 times [2022-01-18 15:43:37,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:37,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501377226] [2022-01-18 15:43:37,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:37,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:37,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:37,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:37,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:37,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501377226] [2022-01-18 15:43:37,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501377226] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:37,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544055632] [2022-01-18 15:43:37,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:43:37,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:37,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:37,992 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:38,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 15:43:38,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:43:38,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:38,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:43:38,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:38,180 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:38,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:43:38,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:38,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:38,732 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:38,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 42 [2022-01-18 15:43:38,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:38,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544055632] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:38,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:38,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-01-18 15:43:38,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12229203] [2022-01-18 15:43:38,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:38,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:43:38,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:38,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:43:38,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:43:38,823 INFO L87 Difference]: Start difference. First operand 2718 states and 11284 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:39,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:39,763 INFO L93 Difference]: Finished difference Result 3134 states and 12893 transitions. [2022-01-18 15:43:39,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:43:39,764 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:43:39,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:39,770 INFO L225 Difference]: With dead ends: 3134 [2022-01-18 15:43:39,770 INFO L226 Difference]: Without dead ends: 3113 [2022-01-18 15:43:39,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=330, Invalid=1392, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:43:39,771 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 215 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 1814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 393 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:39,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 679 Invalid, 1814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1326 Invalid, 0 Unknown, 393 Unchecked, 0.5s Time] [2022-01-18 15:43:39,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3113 states. [2022-01-18 15:43:39,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3113 to 2718. [2022-01-18 15:43:39,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2718 states, 2717 states have (on average 4.15311004784689) internal successors, (11284), 2717 states have internal predecessors, (11284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:39,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2718 states to 2718 states and 11284 transitions. [2022-01-18 15:43:39,812 INFO L78 Accepts]: Start accepts. Automaton has 2718 states and 11284 transitions. Word has length 23 [2022-01-18 15:43:39,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:39,812 INFO L470 AbstractCegarLoop]: Abstraction has 2718 states and 11284 transitions. [2022-01-18 15:43:39,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:39,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2718 states and 11284 transitions. [2022-01-18 15:43:39,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:43:39,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:39,817 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:39,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-01-18 15:43:40,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:40,018 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:40,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:40,018 INFO L85 PathProgramCache]: Analyzing trace with hash -263297070, now seen corresponding path program 22 times [2022-01-18 15:43:40,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:40,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039747114] [2022-01-18 15:43:40,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:40,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:40,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:40,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:40,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039747114] [2022-01-18 15:43:40,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039747114] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:40,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723933424] [2022-01-18 15:43:40,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:43:40,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:40,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:40,166 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:40,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 15:43:40,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:43:40,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:40,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:43:40,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:40,345 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:40,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:43:40,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:40,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:40,767 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:40,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:43:40,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:40,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:43:40,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:40,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723933424] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:40,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:40,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:43:40,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177508526] [2022-01-18 15:43:40,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:40,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:43:40,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:40,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:43:40,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:43:40,822 INFO L87 Difference]: Start difference. First operand 2718 states and 11284 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:41,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:41,732 INFO L93 Difference]: Finished difference Result 3438 states and 14080 transitions. [2022-01-18 15:43:41,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 15:43:41,732 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:43:41,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:41,739 INFO L225 Difference]: With dead ends: 3438 [2022-01-18 15:43:41,739 INFO L226 Difference]: Without dead ends: 3408 [2022-01-18 15:43:41,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=278, Invalid=1528, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 15:43:41,740 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 239 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 1537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:41,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 596 Invalid, 1537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1367 Invalid, 0 Unknown, 94 Unchecked, 0.5s Time] [2022-01-18 15:43:41,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2022-01-18 15:43:41,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 2722. [2022-01-18 15:43:41,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2722 states, 2721 states have (on average 4.1536199926497614) internal successors, (11302), 2721 states have internal predecessors, (11302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:41,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 11302 transitions. [2022-01-18 15:43:41,785 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 11302 transitions. Word has length 23 [2022-01-18 15:43:41,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:41,786 INFO L470 AbstractCegarLoop]: Abstraction has 2722 states and 11302 transitions. [2022-01-18 15:43:41,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:41,786 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 11302 transitions. [2022-01-18 15:43:41,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:43:41,791 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:41,791 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:41,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-01-18 15:43:42,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:42,004 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:42,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:42,004 INFO L85 PathProgramCache]: Analyzing trace with hash -181898014, now seen corresponding path program 23 times [2022-01-18 15:43:42,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:42,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669232297] [2022-01-18 15:43:42,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:42,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:42,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:42,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:42,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:42,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669232297] [2022-01-18 15:43:42,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669232297] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:42,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256326387] [2022-01-18 15:43:42,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:43:42,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:42,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:42,185 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:42,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 15:43:42,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:43:42,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:42,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:43:42,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:42,359 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:42,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:43:42,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:42,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:42,828 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:42,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:43:42,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:42,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:43:42,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:42,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256326387] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:42,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:42,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:43:42,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816288287] [2022-01-18 15:43:42,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:42,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:43:42,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:42,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:43:42,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:43:42,885 INFO L87 Difference]: Start difference. First operand 2722 states and 11302 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:43,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:43,945 INFO L93 Difference]: Finished difference Result 3265 states and 13408 transitions. [2022-01-18 15:43:43,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 15:43:43,945 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:43:43,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:43,953 INFO L225 Difference]: With dead ends: 3265 [2022-01-18 15:43:43,953 INFO L226 Difference]: Without dead ends: 3239 [2022-01-18 15:43:43,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=334, Invalid=1558, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 15:43:43,954 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 193 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 1658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 229 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:43,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 521 Invalid, 1658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1353 Invalid, 0 Unknown, 229 Unchecked, 0.5s Time] [2022-01-18 15:43:43,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3239 states. [2022-01-18 15:43:43,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3239 to 2722. [2022-01-18 15:43:43,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2722 states, 2721 states have (on average 4.1536199926497614) internal successors, (11302), 2721 states have internal predecessors, (11302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:43,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 11302 transitions. [2022-01-18 15:43:43,998 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 11302 transitions. Word has length 23 [2022-01-18 15:43:43,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:43,998 INFO L470 AbstractCegarLoop]: Abstraction has 2722 states and 11302 transitions. [2022-01-18 15:43:43,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:43,998 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 11302 transitions. [2022-01-18 15:43:44,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:43:44,003 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:44,003 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:44,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-01-18 15:43:44,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-01-18 15:43:44,203 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:44,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:44,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1431668720, now seen corresponding path program 24 times [2022-01-18 15:43:44,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:44,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964895770] [2022-01-18 15:43:44,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:44,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:44,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:44,367 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:44,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:44,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964895770] [2022-01-18 15:43:44,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964895770] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:44,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086199230] [2022-01-18 15:43:44,367 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:43:44,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:44,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:44,372 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:44,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 15:43:44,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:43:44,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:44,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:43:44,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:44,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:44,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:43:44,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:44,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:45,082 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:45,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:43:45,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:45,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:43:45,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:45,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086199230] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:45,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:45,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:43:45,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757028287] [2022-01-18 15:43:45,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:45,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:43:45,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:45,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:43:45,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:43:45,136 INFO L87 Difference]: Start difference. First operand 2722 states and 11302 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:45,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:45,969 INFO L93 Difference]: Finished difference Result 3255 states and 13372 transitions. [2022-01-18 15:43:45,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:43:45,969 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:43:45,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:45,976 INFO L225 Difference]: With dead ends: 3255 [2022-01-18 15:43:45,976 INFO L226 Difference]: Without dead ends: 3234 [2022-01-18 15:43:45,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:43:45,976 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 190 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:45,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 511 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1195 Invalid, 0 Unknown, 170 Unchecked, 0.5s Time] [2022-01-18 15:43:45,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3234 states. [2022-01-18 15:43:46,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3234 to 2718. [2022-01-18 15:43:46,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2718 states, 2717 states have (on average 4.15311004784689) internal successors, (11284), 2717 states have internal predecessors, (11284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:46,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2718 states to 2718 states and 11284 transitions. [2022-01-18 15:43:46,018 INFO L78 Accepts]: Start accepts. Automaton has 2718 states and 11284 transitions. Word has length 23 [2022-01-18 15:43:46,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:46,018 INFO L470 AbstractCegarLoop]: Abstraction has 2718 states and 11284 transitions. [2022-01-18 15:43:46,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:46,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2718 states and 11284 transitions. [2022-01-18 15:43:46,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:43:46,023 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:46,023 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:46,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-01-18 15:43:46,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-01-18 15:43:46,223 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:46,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:46,223 INFO L85 PathProgramCache]: Analyzing trace with hash -487844624, now seen corresponding path program 25 times [2022-01-18 15:43:46,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:46,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218237733] [2022-01-18 15:43:46,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:46,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:46,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:46,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:46,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:46,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218237733] [2022-01-18 15:43:46,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218237733] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:46,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922567402] [2022-01-18 15:43:46,365 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:43:46,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:46,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:46,366 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:46,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 15:43:46,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:46,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:43:46,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:46,584 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:46,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:43:46,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:46,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:47,126 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:47,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:43:47,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:47,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:43:47,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:47,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922567402] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:47,199 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:47,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:43:47,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289854960] [2022-01-18 15:43:47,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:47,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:43:47,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:47,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:43:47,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:43:47,200 INFO L87 Difference]: Start difference. First operand 2718 states and 11284 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:47,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:47,884 INFO L93 Difference]: Finished difference Result 3143 states and 12930 transitions. [2022-01-18 15:43:47,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:43:47,884 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:43:47,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:47,890 INFO L225 Difference]: With dead ends: 3143 [2022-01-18 15:43:47,890 INFO L226 Difference]: Without dead ends: 3109 [2022-01-18 15:43:47,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:43:47,891 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 133 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:47,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 469 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1168 Invalid, 0 Unknown, 147 Unchecked, 0.4s Time] [2022-01-18 15:43:47,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2022-01-18 15:43:47,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 2733. [2022-01-18 15:43:47,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2733 states, 2732 states have (on average 4.15190336749634) internal successors, (11343), 2732 states have internal predecessors, (11343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:47,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2733 states to 2733 states and 11343 transitions. [2022-01-18 15:43:47,931 INFO L78 Accepts]: Start accepts. Automaton has 2733 states and 11343 transitions. Word has length 23 [2022-01-18 15:43:47,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:47,931 INFO L470 AbstractCegarLoop]: Abstraction has 2733 states and 11343 transitions. [2022-01-18 15:43:47,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:47,931 INFO L276 IsEmpty]: Start isEmpty. Operand 2733 states and 11343 transitions. [2022-01-18 15:43:47,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:43:47,935 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:47,935 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:47,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-01-18 15:43:48,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-18 15:43:48,136 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:48,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:48,136 INFO L85 PathProgramCache]: Analyzing trace with hash -333407106, now seen corresponding path program 26 times [2022-01-18 15:43:48,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:48,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268425459] [2022-01-18 15:43:48,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:48,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:48,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:48,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:48,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:48,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268425459] [2022-01-18 15:43:48,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268425459] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:48,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965422964] [2022-01-18 15:43:48,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:43:48,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:48,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:48,282 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:48,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 15:43:48,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:43:48,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:48,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:43:48,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:48,476 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:48,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:43:48,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:48,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:48,916 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:48,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:43:48,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:48,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:43:48,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:48,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965422964] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:48,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:48,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:43:48,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960931694] [2022-01-18 15:43:48,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:48,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:43:48,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:48,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:43:48,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:43:48,973 INFO L87 Difference]: Start difference. First operand 2733 states and 11343 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:49,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:49,545 INFO L93 Difference]: Finished difference Result 3187 states and 13080 transitions. [2022-01-18 15:43:49,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:43:49,545 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:43:49,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:49,552 INFO L225 Difference]: With dead ends: 3187 [2022-01-18 15:43:49,552 INFO L226 Difference]: Without dead ends: 3157 [2022-01-18 15:43:49,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:43:49,553 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 130 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 1238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:49,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 473 Invalid, 1238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1033 Invalid, 0 Unknown, 170 Unchecked, 0.4s Time] [2022-01-18 15:43:49,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3157 states. [2022-01-18 15:43:49,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3157 to 2737. [2022-01-18 15:43:49,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 4.152412280701754) internal successors, (11361), 2736 states have internal predecessors, (11361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:49,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 11361 transitions. [2022-01-18 15:43:49,611 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 11361 transitions. Word has length 23 [2022-01-18 15:43:49,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:49,611 INFO L470 AbstractCegarLoop]: Abstraction has 2737 states and 11361 transitions. [2022-01-18 15:43:49,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:49,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 11361 transitions. [2022-01-18 15:43:49,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:43:49,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:49,617 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:49,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:49,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:49,839 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:49,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:49,839 INFO L85 PathProgramCache]: Analyzing trace with hash -252008050, now seen corresponding path program 27 times [2022-01-18 15:43:49,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:49,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891874049] [2022-01-18 15:43:49,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:49,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:49,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:49,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:49,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:49,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891874049] [2022-01-18 15:43:49,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891874049] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:49,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641389835] [2022-01-18 15:43:49,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:43:49,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:49,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:49,993 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:49,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 15:43:50,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:43:50,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:50,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:43:50,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:50,189 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:50,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:43:50,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:50,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:50,709 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:50,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:43:50,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:50,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:43:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:50,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641389835] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:50,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:50,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:43:50,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127419197] [2022-01-18 15:43:50,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:50,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:43:50,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:50,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:43:50,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:43:50,782 INFO L87 Difference]: Start difference. First operand 2737 states and 11361 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:51,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:51,732 INFO L93 Difference]: Finished difference Result 3190 states and 13110 transitions. [2022-01-18 15:43:51,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 15:43:51,732 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:43:51,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:51,739 INFO L225 Difference]: With dead ends: 3190 [2022-01-18 15:43:51,740 INFO L226 Difference]: Without dead ends: 3164 [2022-01-18 15:43:51,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=340, Invalid=1730, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 15:43:51,741 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 190 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:51,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 404 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 932 Invalid, 0 Unknown, 192 Unchecked, 0.4s Time] [2022-01-18 15:43:51,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3164 states. [2022-01-18 15:43:51,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3164 to 2737. [2022-01-18 15:43:51,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 4.152412280701754) internal successors, (11361), 2736 states have internal predecessors, (11361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:51,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 11361 transitions. [2022-01-18 15:43:51,782 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 11361 transitions. Word has length 23 [2022-01-18 15:43:51,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:51,782 INFO L470 AbstractCegarLoop]: Abstraction has 2737 states and 11361 transitions. [2022-01-18 15:43:51,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:51,782 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 11361 transitions. [2022-01-18 15:43:51,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:43:51,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:51,786 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:51,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-01-18 15:43:51,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-01-18 15:43:51,987 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:51,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:51,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1361558684, now seen corresponding path program 28 times [2022-01-18 15:43:51,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:51,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952801909] [2022-01-18 15:43:51,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:51,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:51,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:52,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:52,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952801909] [2022-01-18 15:43:52,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952801909] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:52,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346584116] [2022-01-18 15:43:52,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:43:52,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:52,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:52,143 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:52,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 15:43:52,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:43:52,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:52,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:43:52,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:52,310 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:52,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:43:52,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:52,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:52,873 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:52,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:43:52,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:52,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:43:52,928 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:52,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346584116] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:52,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:52,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:43:52,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299971525] [2022-01-18 15:43:52,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:52,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:43:52,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:52,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:43:52,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:43:52,929 INFO L87 Difference]: Start difference. First operand 2737 states and 11361 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:53,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:53,798 INFO L93 Difference]: Finished difference Result 3206 states and 13174 transitions. [2022-01-18 15:43:53,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:43:53,798 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:43:53,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:53,805 INFO L225 Difference]: With dead ends: 3206 [2022-01-18 15:43:53,805 INFO L226 Difference]: Without dead ends: 3185 [2022-01-18 15:43:53,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=254, Invalid=1306, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:43:53,805 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 156 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:53,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 482 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1172 Invalid, 0 Unknown, 116 Unchecked, 0.5s Time] [2022-01-18 15:43:53,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3185 states. [2022-01-18 15:43:53,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3185 to 2733. [2022-01-18 15:43:53,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2733 states, 2732 states have (on average 4.15190336749634) internal successors, (11343), 2732 states have internal predecessors, (11343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:53,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2733 states to 2733 states and 11343 transitions. [2022-01-18 15:43:53,847 INFO L78 Accepts]: Start accepts. Automaton has 2733 states and 11343 transitions. Word has length 23 [2022-01-18 15:43:53,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:53,847 INFO L470 AbstractCegarLoop]: Abstraction has 2733 states and 11343 transitions. [2022-01-18 15:43:53,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:53,847 INFO L276 IsEmpty]: Start isEmpty. Operand 2733 states and 11343 transitions. [2022-01-18 15:43:53,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:43:53,851 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:53,851 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:53,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-01-18 15:43:54,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-01-18 15:43:54,051 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:54,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:54,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1772772286, now seen corresponding path program 29 times [2022-01-18 15:43:54,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:54,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034894953] [2022-01-18 15:43:54,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:54,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:54,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:54,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:54,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:54,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034894953] [2022-01-18 15:43:54,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034894953] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:54,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936996544] [2022-01-18 15:43:54,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:43:54,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:54,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:54,268 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:54,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 15:43:54,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:43:54,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:54,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:43:54,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:54,506 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:54,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2022-01-18 15:43:54,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:54,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:54,967 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:54,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 42 [2022-01-18 15:43:55,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:55,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936996544] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:55,022 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:55,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-01-18 15:43:55,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185472872] [2022-01-18 15:43:55,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:55,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:43:55,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:55,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:43:55,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:43:55,023 INFO L87 Difference]: Start difference. First operand 2733 states and 11343 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:55,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:55,592 INFO L93 Difference]: Finished difference Result 3016 states and 12415 transitions. [2022-01-18 15:43:55,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:43:55,592 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:43:55,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:55,598 INFO L225 Difference]: With dead ends: 3016 [2022-01-18 15:43:55,598 INFO L226 Difference]: Without dead ends: 2994 [2022-01-18 15:43:55,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:43:55,599 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 154 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 328 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:55,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 587 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 794 Invalid, 0 Unknown, 328 Unchecked, 0.3s Time] [2022-01-18 15:43:55,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2994 states. [2022-01-18 15:43:55,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2994 to 2737. [2022-01-18 15:43:55,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 4.152412280701754) internal successors, (11361), 2736 states have internal predecessors, (11361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:55,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 11361 transitions. [2022-01-18 15:43:55,651 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 11361 transitions. Word has length 23 [2022-01-18 15:43:55,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:55,652 INFO L470 AbstractCegarLoop]: Abstraction has 2737 states and 11361 transitions. [2022-01-18 15:43:55,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:55,652 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 11361 transitions. [2022-01-18 15:43:55,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:43:55,657 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:55,657 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:55,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:55,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 15:43:55,875 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:55,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:55,876 INFO L85 PathProgramCache]: Analyzing trace with hash -323294324, now seen corresponding path program 30 times [2022-01-18 15:43:55,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:55,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110617239] [2022-01-18 15:43:55,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:55,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:55,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:56,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:56,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:56,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110617239] [2022-01-18 15:43:56,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110617239] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:56,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896433762] [2022-01-18 15:43:56,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:43:56,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:56,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:56,071 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:56,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 15:43:56,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:43:56,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:56,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:43:56,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:56,229 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:56,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:43:56,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:56,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:56,752 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:56,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 42 [2022-01-18 15:43:56,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:56,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896433762] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:56,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:56,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-01-18 15:43:56,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214339682] [2022-01-18 15:43:56,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:56,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:43:56,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:56,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:43:56,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:43:56,822 INFO L87 Difference]: Start difference. First operand 2737 states and 11361 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:57,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:57,573 INFO L93 Difference]: Finished difference Result 3074 states and 12656 transitions. [2022-01-18 15:43:57,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:43:57,573 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:43:57,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:57,580 INFO L225 Difference]: With dead ends: 3074 [2022-01-18 15:43:57,580 INFO L226 Difference]: Without dead ends: 3053 [2022-01-18 15:43:57,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=327, Invalid=1395, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:43:57,580 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 228 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 414 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:57,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 558 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 895 Invalid, 0 Unknown, 414 Unchecked, 0.4s Time] [2022-01-18 15:43:57,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3053 states. [2022-01-18 15:43:57,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3053 to 2733. [2022-01-18 15:43:57,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2733 states, 2732 states have (on average 4.15190336749634) internal successors, (11343), 2732 states have internal predecessors, (11343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:57,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2733 states to 2733 states and 11343 transitions. [2022-01-18 15:43:57,630 INFO L78 Accepts]: Start accepts. Automaton has 2733 states and 11343 transitions. Word has length 23 [2022-01-18 15:43:57,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:57,630 INFO L470 AbstractCegarLoop]: Abstraction has 2733 states and 11343 transitions. [2022-01-18 15:43:57,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:57,630 INFO L276 IsEmpty]: Start isEmpty. Operand 2733 states and 11343 transitions. [2022-01-18 15:43:57,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:43:57,634 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:57,634 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:57,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-01-18 15:43:57,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-01-18 15:43:57,835 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:57,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:57,835 INFO L85 PathProgramCache]: Analyzing trace with hash 2122269664, now seen corresponding path program 31 times [2022-01-18 15:43:57,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:57,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467778435] [2022-01-18 15:43:57,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:57,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:57,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:57,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:57,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467778435] [2022-01-18 15:43:57,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467778435] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:57,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323690612] [2022-01-18 15:43:57,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:43:57,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:57,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:57,995 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:58,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 15:43:58,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:58,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:43:58,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:58,204 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:58,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:43:58,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:58,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:58,630 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:43:58,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:43:58,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:43:58,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:43:58,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:58,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323690612] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:58,685 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:58,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:43:58,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294913441] [2022-01-18 15:43:58,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:58,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:43:58,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:58,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:43:58,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:43:58,686 INFO L87 Difference]: Start difference. First operand 2733 states and 11343 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:59,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:59,520 INFO L93 Difference]: Finished difference Result 3441 states and 14094 transitions. [2022-01-18 15:43:59,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 15:43:59,521 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:43:59,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:59,528 INFO L225 Difference]: With dead ends: 3441 [2022-01-18 15:43:59,528 INFO L226 Difference]: Without dead ends: 3411 [2022-01-18 15:43:59,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=1381, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:43:59,529 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 235 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:59,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 521 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1181 Invalid, 0 Unknown, 121 Unchecked, 0.5s Time] [2022-01-18 15:43:59,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2022-01-18 15:43:59,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 2725. [2022-01-18 15:43:59,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 2724 states have (on average 4.1501468428781205) internal successors, (11305), 2724 states have internal predecessors, (11305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:59,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 11305 transitions. [2022-01-18 15:43:59,572 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 11305 transitions. Word has length 23 [2022-01-18 15:43:59,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:59,572 INFO L470 AbstractCegarLoop]: Abstraction has 2725 states and 11305 transitions. [2022-01-18 15:43:59,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:59,572 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 11305 transitions. [2022-01-18 15:43:59,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:43:59,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:59,576 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:59,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:59,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:59,777 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:43:59,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:59,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1607113522, now seen corresponding path program 32 times [2022-01-18 15:43:59,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:59,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490202945] [2022-01-18 15:43:59,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:59,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:59,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:59,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:59,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490202945] [2022-01-18 15:43:59,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490202945] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:59,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202008844] [2022-01-18 15:43:59,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:43:59,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:59,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:59,951 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:59,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 15:43:59,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:43:59,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:59,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:43:59,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:00,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:00,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2022-01-18 15:44:00,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:00,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:01,002 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:01,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 42 [2022-01-18 15:44:01,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:01,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202008844] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:01,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:01,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-01-18 15:44:01,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756424438] [2022-01-18 15:44:01,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:01,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:44:01,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:01,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:44:01,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:44:01,104 INFO L87 Difference]: Start difference. First operand 2725 states and 11305 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:01,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:01,761 INFO L93 Difference]: Finished difference Result 3091 states and 12721 transitions. [2022-01-18 15:44:01,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:44:01,762 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:44:01,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:01,768 INFO L225 Difference]: With dead ends: 3091 [2022-01-18 15:44:01,768 INFO L226 Difference]: Without dead ends: 3069 [2022-01-18 15:44:01,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=189, Invalid=1143, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:44:01,769 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 135 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:01,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 572 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1095 Invalid, 0 Unknown, 208 Unchecked, 0.4s Time] [2022-01-18 15:44:01,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3069 states. [2022-01-18 15:44:01,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3069 to 2725. [2022-01-18 15:44:01,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 2724 states have (on average 4.1501468428781205) internal successors, (11305), 2724 states have internal predecessors, (11305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:01,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 11305 transitions. [2022-01-18 15:44:01,812 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 11305 transitions. Word has length 23 [2022-01-18 15:44:01,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:01,813 INFO L470 AbstractCegarLoop]: Abstraction has 2725 states and 11305 transitions. [2022-01-18 15:44:01,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:01,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 11305 transitions. [2022-01-18 15:44:01,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:44:01,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:01,817 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:01,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:02,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-01-18 15:44:02,017 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:44:02,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:02,018 INFO L85 PathProgramCache]: Analyzing trace with hash 591787164, now seen corresponding path program 33 times [2022-01-18 15:44:02,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:02,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086478735] [2022-01-18 15:44:02,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:02,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:02,228 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:02,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:02,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086478735] [2022-01-18 15:44:02,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086478735] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:02,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022843515] [2022-01-18 15:44:02,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:44:02,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:02,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:02,229 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:02,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 15:44:02,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:44:02,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:02,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:44:02,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:02,409 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:02,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:44:02,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:02,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:02,937 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:02,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 42 [2022-01-18 15:44:03,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:03,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022843515] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:03,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:03,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-01-18 15:44:03,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027798363] [2022-01-18 15:44:03,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:03,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:44:03,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:03,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:44:03,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:44:03,038 INFO L87 Difference]: Start difference. First operand 2725 states and 11305 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:03,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:03,877 INFO L93 Difference]: Finished difference Result 3077 states and 12670 transitions. [2022-01-18 15:44:03,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:44:03,879 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:44:03,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:03,885 INFO L225 Difference]: With dead ends: 3077 [2022-01-18 15:44:03,885 INFO L226 Difference]: Without dead ends: 3056 [2022-01-18 15:44:03,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=294, Invalid=1428, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:44:03,886 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 186 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 1450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:03,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 495 Invalid, 1450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1079 Invalid, 0 Unknown, 269 Unchecked, 0.4s Time] [2022-01-18 15:44:03,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2022-01-18 15:44:03,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 2717. [2022-01-18 15:44:03,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2717 states, 2716 states have (on average 4.149852724594993) internal successors, (11271), 2716 states have internal predecessors, (11271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:03,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2717 states to 2717 states and 11271 transitions. [2022-01-18 15:44:03,927 INFO L78 Accepts]: Start accepts. Automaton has 2717 states and 11271 transitions. Word has length 23 [2022-01-18 15:44:03,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:03,927 INFO L470 AbstractCegarLoop]: Abstraction has 2717 states and 11271 transitions. [2022-01-18 15:44:03,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:03,927 INFO L276 IsEmpty]: Start isEmpty. Operand 2717 states and 11271 transitions. [2022-01-18 15:44:03,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:44:03,931 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:03,931 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:03,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-01-18 15:44:04,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:04,132 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:44:04,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:04,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1452676004, now seen corresponding path program 34 times [2022-01-18 15:44:04,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:04,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58343548] [2022-01-18 15:44:04,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:04,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:04,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:04,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:04,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:04,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58343548] [2022-01-18 15:44:04,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58343548] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:04,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450870286] [2022-01-18 15:44:04,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:44:04,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:04,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:04,324 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:04,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 15:44:04,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:44:04,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:04,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:44:04,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:04,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:04,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:04,580 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:04,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 44 [2022-01-18 15:44:04,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:04,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:05,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:44:05,092 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:05,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 30 [2022-01-18 15:44:05,191 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:05,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450870286] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:05,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:05,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2022-01-18 15:44:05,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600750641] [2022-01-18 15:44:05,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:05,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:44:05,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:05,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:44:05,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:44:05,192 INFO L87 Difference]: Start difference. First operand 2717 states and 11271 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:06,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:06,953 INFO L93 Difference]: Finished difference Result 3876 states and 15787 transitions. [2022-01-18 15:44:06,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 15:44:06,954 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:44:06,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:06,962 INFO L225 Difference]: With dead ends: 3876 [2022-01-18 15:44:06,963 INFO L226 Difference]: Without dead ends: 3828 [2022-01-18 15:44:06,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=550, Invalid=3232, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 15:44:06,963 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 358 mSDsluCounter, 1141 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 1915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 477 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:06,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 829 Invalid, 1915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1274 Invalid, 0 Unknown, 477 Unchecked, 0.6s Time] [2022-01-18 15:44:06,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3828 states. [2022-01-18 15:44:06,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3828 to 2753. [2022-01-18 15:44:07,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 4.155523255813954) internal successors, (11436), 2752 states have internal predecessors, (11436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:07,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 11436 transitions. [2022-01-18 15:44:07,007 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 11436 transitions. Word has length 23 [2022-01-18 15:44:07,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:07,007 INFO L470 AbstractCegarLoop]: Abstraction has 2753 states and 11436 transitions. [2022-01-18 15:44:07,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:07,007 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 11436 transitions. [2022-01-18 15:44:07,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:44:07,011 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:07,011 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:07,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-01-18 15:44:07,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:07,211 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:44:07,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:07,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1445095954, now seen corresponding path program 35 times [2022-01-18 15:44:07,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:07,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609379906] [2022-01-18 15:44:07,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:07,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:07,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:07,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:07,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609379906] [2022-01-18 15:44:07,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609379906] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:07,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264597250] [2022-01-18 15:44:07,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:44:07,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:07,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:07,431 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:07,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 15:44:07,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 15:44:07,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:07,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:44:07,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:07,616 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:07,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2022-01-18 15:44:08,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:08,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:08,297 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:08,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 42 [2022-01-18 15:44:08,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:08,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264597250] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:08,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:08,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-01-18 15:44:08,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420135993] [2022-01-18 15:44:08,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:08,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:44:08,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:08,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:44:08,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=648, Unknown=1, NotChecked=0, Total=756 [2022-01-18 15:44:08,378 INFO L87 Difference]: Start difference. First operand 2753 states and 11436 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:09,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:09,274 INFO L93 Difference]: Finished difference Result 3579 states and 14659 transitions. [2022-01-18 15:44:09,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:44:09,274 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:44:09,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:09,282 INFO L225 Difference]: With dead ends: 3579 [2022-01-18 15:44:09,282 INFO L226 Difference]: Without dead ends: 3557 [2022-01-18 15:44:09,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=249, Invalid=1390, Unknown=1, NotChecked=0, Total=1640 [2022-01-18 15:44:09,283 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 303 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 408 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:09,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 778 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1289 Invalid, 0 Unknown, 408 Unchecked, 0.5s Time] [2022-01-18 15:44:09,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2022-01-18 15:44:09,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 2753. [2022-01-18 15:44:09,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 4.155523255813954) internal successors, (11436), 2752 states have internal predecessors, (11436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:09,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 11436 transitions. [2022-01-18 15:44:09,329 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 11436 transitions. Word has length 23 [2022-01-18 15:44:09,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:09,329 INFO L470 AbstractCegarLoop]: Abstraction has 2753 states and 11436 transitions. [2022-01-18 15:44:09,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:09,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 11436 transitions. [2022-01-18 15:44:09,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:44:09,333 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:09,333 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:09,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-01-18 15:44:09,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:09,534 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:44:09,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:09,534 INFO L85 PathProgramCache]: Analyzing trace with hash 2030429906, now seen corresponding path program 36 times [2022-01-18 15:44:09,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:09,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893387799] [2022-01-18 15:44:09,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:09,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:09,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:09,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:09,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:09,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893387799] [2022-01-18 15:44:09,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893387799] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:09,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529283403] [2022-01-18 15:44:09,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:44:09,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:09,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:09,732 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:09,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 15:44:09,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:44:09,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:09,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 15:44:09,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:09,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:09,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:44:09,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-01-18 15:44:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:09,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:10,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:10,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:44:10,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 15:44:10,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529283403] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:10,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:10,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 7] total 24 [2022-01-18 15:44:10,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945935288] [2022-01-18 15:44:10,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:10,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:44:10,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:10,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:44:10,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:44:10,164 INFO L87 Difference]: Start difference. First operand 2753 states and 11436 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:11,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:11,768 INFO L93 Difference]: Finished difference Result 4582 states and 18594 transitions. [2022-01-18 15:44:11,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 15:44:11,768 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:44:11,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:11,779 INFO L225 Difference]: With dead ends: 4582 [2022-01-18 15:44:11,779 INFO L226 Difference]: Without dead ends: 4522 [2022-01-18 15:44:11,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=679, Invalid=2627, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 15:44:11,780 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 443 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 1582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:11,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 522 Invalid, 1582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1154 Invalid, 0 Unknown, 194 Unchecked, 0.5s Time] [2022-01-18 15:44:11,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4522 states. [2022-01-18 15:44:11,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4522 to 2872. [2022-01-18 15:44:11,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2872 states, 2871 states have (on average 4.176593521421108) internal successors, (11991), 2871 states have internal predecessors, (11991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:11,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 11991 transitions. [2022-01-18 15:44:11,855 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 11991 transitions. Word has length 23 [2022-01-18 15:44:11,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:11,855 INFO L470 AbstractCegarLoop]: Abstraction has 2872 states and 11991 transitions. [2022-01-18 15:44:11,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:11,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 11991 transitions. [2022-01-18 15:44:11,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:44:11,860 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:11,861 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:11,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-01-18 15:44:12,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:12,075 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:44:12,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:12,076 INFO L85 PathProgramCache]: Analyzing trace with hash -650970656, now seen corresponding path program 37 times [2022-01-18 15:44:12,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:12,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500546724] [2022-01-18 15:44:12,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:12,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:12,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:12,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:12,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:12,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500546724] [2022-01-18 15:44:12,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500546724] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:12,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817329909] [2022-01-18 15:44:12,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:44:12,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:12,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:12,271 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:12,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 15:44:12,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:12,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:44:12,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:12,437 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:12,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:44:12,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:12,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:12,995 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:12,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 42 [2022-01-18 15:44:13,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:13,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817329909] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:13,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:13,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-01-18 15:44:13,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25661237] [2022-01-18 15:44:13,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:13,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:44:13,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:13,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:44:13,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:44:13,077 INFO L87 Difference]: Start difference. First operand 2872 states and 11991 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:14,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:14,284 INFO L93 Difference]: Finished difference Result 3496 states and 14414 transitions. [2022-01-18 15:44:14,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:44:14,284 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:44:14,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:14,291 INFO L225 Difference]: With dead ends: 3496 [2022-01-18 15:44:14,292 INFO L226 Difference]: Without dead ends: 3475 [2022-01-18 15:44:14,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=328, Invalid=1564, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 15:44:14,292 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 281 mSDsluCounter, 1049 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 2054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 869 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:14,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 619 Invalid, 2054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1093 Invalid, 0 Unknown, 869 Unchecked, 0.5s Time] [2022-01-18 15:44:14,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3475 states. [2022-01-18 15:44:14,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3475 to 2872. [2022-01-18 15:44:14,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2872 states, 2871 states have (on average 4.176593521421108) internal successors, (11991), 2871 states have internal predecessors, (11991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:14,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 11991 transitions. [2022-01-18 15:44:14,359 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 11991 transitions. Word has length 23 [2022-01-18 15:44:14,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:14,359 INFO L470 AbstractCegarLoop]: Abstraction has 2872 states and 11991 transitions. [2022-01-18 15:44:14,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:14,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 11991 transitions. [2022-01-18 15:44:14,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:44:14,364 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:14,364 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:14,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:14,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-01-18 15:44:14,564 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:44:14,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:14,565 INFO L85 PathProgramCache]: Analyzing trace with hash -805408174, now seen corresponding path program 38 times [2022-01-18 15:44:14,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:14,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514480780] [2022-01-18 15:44:14,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:14,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:14,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:14,719 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:14,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:14,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514480780] [2022-01-18 15:44:14,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514480780] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:14,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941092440] [2022-01-18 15:44:14,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:44:14,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:14,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:14,721 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:14,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 15:44:14,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:44:14,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:14,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:44:14,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:14,875 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:14,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:44:15,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:15,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:15,387 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:15,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:44:15,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:15,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:44:15,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:15,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941092440] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:15,444 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:15,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:44:15,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492574293] [2022-01-18 15:44:15,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:15,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:44:15,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:15,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:44:15,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:44:15,445 INFO L87 Difference]: Start difference. First operand 2872 states and 11991 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:16,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:16,402 INFO L93 Difference]: Finished difference Result 3767 states and 15459 transitions. [2022-01-18 15:44:16,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:44:16,402 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:44:16,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:16,410 INFO L225 Difference]: With dead ends: 3767 [2022-01-18 15:44:16,410 INFO L226 Difference]: Without dead ends: 3725 [2022-01-18 15:44:16,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:44:16,410 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 283 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:16,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 543 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1256 Invalid, 0 Unknown, 222 Unchecked, 0.5s Time] [2022-01-18 15:44:16,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3725 states. [2022-01-18 15:44:16,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3725 to 2888. [2022-01-18 15:44:16,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2888 states, 2887 states have (on average 4.1783858676827155) internal successors, (12063), 2887 states have internal predecessors, (12063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:16,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2888 states to 2888 states and 12063 transitions. [2022-01-18 15:44:16,454 INFO L78 Accepts]: Start accepts. Automaton has 2888 states and 12063 transitions. Word has length 23 [2022-01-18 15:44:16,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:16,454 INFO L470 AbstractCegarLoop]: Abstraction has 2888 states and 12063 transitions. [2022-01-18 15:44:16,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:16,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2888 states and 12063 transitions. [2022-01-18 15:44:16,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:44:16,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:16,458 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:16,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-01-18 15:44:16,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-01-18 15:44:16,659 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:44:16,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:16,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1570045778, now seen corresponding path program 39 times [2022-01-18 15:44:16,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:16,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402288391] [2022-01-18 15:44:16,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:16,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:16,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:16,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:16,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:16,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402288391] [2022-01-18 15:44:16,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402288391] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:16,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927522469] [2022-01-18 15:44:16,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:44:16,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:16,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:16,784 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:16,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 15:44:16,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:44:16,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:16,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:44:16,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:16,986 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:16,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:44:17,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:17,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:17,600 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:17,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:44:17,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:17,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:44:17,654 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:17,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927522469] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:17,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:17,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:44:17,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002065342] [2022-01-18 15:44:17,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:17,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:44:17,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:17,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:44:17,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=514, Unknown=1, NotChecked=0, Total=600 [2022-01-18 15:44:17,655 INFO L87 Difference]: Start difference. First operand 2888 states and 12063 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:18,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:18,445 INFO L93 Difference]: Finished difference Result 3418 states and 14110 transitions. [2022-01-18 15:44:18,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:44:18,445 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:44:18,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:18,454 INFO L225 Difference]: With dead ends: 3418 [2022-01-18 15:44:18,454 INFO L226 Difference]: Without dead ends: 3384 [2022-01-18 15:44:18,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=172, Invalid=1087, Unknown=1, NotChecked=0, Total=1260 [2022-01-18 15:44:18,454 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 228 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:18,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 549 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1351 Invalid, 0 Unknown, 153 Unchecked, 0.5s Time] [2022-01-18 15:44:18,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3384 states. [2022-01-18 15:44:18,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3384 to 2900. [2022-01-18 15:44:18,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2900 states, 2899 states have (on average 4.178682304242843) internal successors, (12114), 2899 states have internal predecessors, (12114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:18,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2900 states to 2900 states and 12114 transitions. [2022-01-18 15:44:18,510 INFO L78 Accepts]: Start accepts. Automaton has 2900 states and 12114 transitions. Word has length 23 [2022-01-18 15:44:18,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:18,510 INFO L470 AbstractCegarLoop]: Abstraction has 2900 states and 12114 transitions. [2022-01-18 15:44:18,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:18,511 INFO L276 IsEmpty]: Start isEmpty. Operand 2900 states and 12114 transitions. [2022-01-18 15:44:18,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:44:18,516 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:18,516 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:18,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:18,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-01-18 15:44:18,731 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:44:18,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:18,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1724483296, now seen corresponding path program 40 times [2022-01-18 15:44:18,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:18,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503249221] [2022-01-18 15:44:18,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:18,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:18,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:18,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503249221] [2022-01-18 15:44:18,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503249221] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:18,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263808873] [2022-01-18 15:44:18,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:44:18,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:18,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:18,855 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:18,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 15:44:18,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:44:18,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:18,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:44:18,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:19,031 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:19,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:44:19,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:19,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:19,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:19,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:44:19,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:19,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:44:19,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:19,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263808873] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:19,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:19,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:44:19,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948437548] [2022-01-18 15:44:19,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:19,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:44:19,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:19,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:44:19,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:44:19,537 INFO L87 Difference]: Start difference. First operand 2900 states and 12114 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:20,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:20,286 INFO L93 Difference]: Finished difference Result 3395 states and 14015 transitions. [2022-01-18 15:44:20,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:44:20,286 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:44:20,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:20,294 INFO L225 Difference]: With dead ends: 3395 [2022-01-18 15:44:20,294 INFO L226 Difference]: Without dead ends: 3365 [2022-01-18 15:44:20,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:44:20,294 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 232 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 1373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:20,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 501 Invalid, 1373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1251 Invalid, 0 Unknown, 43 Unchecked, 0.5s Time] [2022-01-18 15:44:20,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3365 states. [2022-01-18 15:44:20,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3365 to 2904. [2022-01-18 15:44:20,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2904 states, 2903 states have (on average 4.179125043058905) internal successors, (12132), 2903 states have internal predecessors, (12132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:20,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2904 states to 2904 states and 12132 transitions. [2022-01-18 15:44:20,337 INFO L78 Accepts]: Start accepts. Automaton has 2904 states and 12132 transitions. Word has length 23 [2022-01-18 15:44:20,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:20,337 INFO L470 AbstractCegarLoop]: Abstraction has 2904 states and 12132 transitions. [2022-01-18 15:44:20,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:20,337 INFO L276 IsEmpty]: Start isEmpty. Operand 2904 states and 12132 transitions. [2022-01-18 15:44:20,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:44:20,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:20,342 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:20,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:20,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:20,542 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:44:20,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:20,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1805882352, now seen corresponding path program 41 times [2022-01-18 15:44:20,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:20,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958476411] [2022-01-18 15:44:20,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:20,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:20,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:20,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:20,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:20,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958476411] [2022-01-18 15:44:20,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958476411] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:20,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585329063] [2022-01-18 15:44:20,705 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:44:20,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:20,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:20,706 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:20,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 15:44:20,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:44:20,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:20,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:44:20,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:20,917 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:20,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:44:21,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:21,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:21,409 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:21,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:44:21,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:21,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:44:21,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:21,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585329063] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:21,463 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:21,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:44:21,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972565414] [2022-01-18 15:44:21,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:21,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:44:21,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:21,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:44:21,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:44:21,464 INFO L87 Difference]: Start difference. First operand 2904 states and 12132 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:22,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:22,374 INFO L93 Difference]: Finished difference Result 3554 states and 14620 transitions. [2022-01-18 15:44:22,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:44:22,374 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:44:22,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:22,382 INFO L225 Difference]: With dead ends: 3554 [2022-01-18 15:44:22,382 INFO L226 Difference]: Without dead ends: 3502 [2022-01-18 15:44:22,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=247, Invalid=1393, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:44:22,382 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 322 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:22,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 440 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1074 Invalid, 0 Unknown, 60 Unchecked, 0.5s Time] [2022-01-18 15:44:22,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3502 states. [2022-01-18 15:44:22,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3502 to 2916. [2022-01-18 15:44:22,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2916 states, 2915 states have (on average 4.179073756432247) internal successors, (12182), 2915 states have internal predecessors, (12182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:22,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 12182 transitions. [2022-01-18 15:44:22,444 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 12182 transitions. Word has length 23 [2022-01-18 15:44:22,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:22,444 INFO L470 AbstractCegarLoop]: Abstraction has 2916 states and 12182 transitions. [2022-01-18 15:44:22,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:22,444 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 12182 transitions. [2022-01-18 15:44:22,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:44:22,448 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:22,448 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:22,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:22,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:22,649 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:44:22,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:22,649 INFO L85 PathProgramCache]: Analyzing trace with hash -875518210, now seen corresponding path program 42 times [2022-01-18 15:44:22,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:22,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799461745] [2022-01-18 15:44:22,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:22,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:22,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:22,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:22,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:22,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799461745] [2022-01-18 15:44:22,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799461745] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:22,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870926557] [2022-01-18 15:44:22,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:44:22,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:22,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:22,803 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:22,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 15:44:22,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:44:22,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:22,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 15:44:22,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:22,988 INFO L353 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2022-01-18 15:44:22,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 47 [2022-01-18 15:44:23,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:23,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:23,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:23,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870926557] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:23,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:23,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2022-01-18 15:44:23,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060424214] [2022-01-18 15:44:23,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:23,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:44:23,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:23,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:44:23,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:44:23,341 INFO L87 Difference]: Start difference. First operand 2916 states and 12182 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:25,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:25,580 INFO L93 Difference]: Finished difference Result 4303 states and 17540 transitions. [2022-01-18 15:44:25,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 15:44:25,580 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:44:25,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:25,589 INFO L225 Difference]: With dead ends: 4303 [2022-01-18 15:44:25,589 INFO L226 Difference]: Without dead ends: 4250 [2022-01-18 15:44:25,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=521, Invalid=3261, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 15:44:25,589 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 442 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 2237 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 2436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 2237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:25,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 777 Invalid, 2436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 2237 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 15:44:25,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4250 states. [2022-01-18 15:44:25,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4250 to 2908. [2022-01-18 15:44:25,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2908 states, 2907 states have (on average 4.180598555211558) internal successors, (12153), 2907 states have internal predecessors, (12153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:25,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2908 states to 2908 states and 12153 transitions. [2022-01-18 15:44:25,637 INFO L78 Accepts]: Start accepts. Automaton has 2908 states and 12153 transitions. Word has length 23 [2022-01-18 15:44:25,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:25,637 INFO L470 AbstractCegarLoop]: Abstraction has 2908 states and 12153 transitions. [2022-01-18 15:44:25,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:25,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2908 states and 12153 transitions. [2022-01-18 15:44:25,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:44:25,641 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:25,641 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:25,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-01-18 15:44:25,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:25,842 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:44:25,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:25,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1730602444, now seen corresponding path program 43 times [2022-01-18 15:44:25,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:25,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728159786] [2022-01-18 15:44:25,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:25,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:25,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:25,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:25,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728159786] [2022-01-18 15:44:25,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728159786] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:25,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670801695] [2022-01-18 15:44:25,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:44:25,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:25,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:25,996 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:25,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 15:44:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:26,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:44:26,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:26,219 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:26,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2022-01-18 15:44:26,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:26,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:26,682 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:26,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:44:26,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:26,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:44:26,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:26,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670801695] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:26,741 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:26,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:44:26,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418860087] [2022-01-18 15:44:26,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:26,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:44:26,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:26,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:44:26,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:44:26,742 INFO L87 Difference]: Start difference. First operand 2908 states and 12153 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:27,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:27,330 INFO L93 Difference]: Finished difference Result 3351 states and 13838 transitions. [2022-01-18 15:44:27,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:44:27,330 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:44:27,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:27,338 INFO L225 Difference]: With dead ends: 3351 [2022-01-18 15:44:27,338 INFO L226 Difference]: Without dead ends: 3342 [2022-01-18 15:44:27,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:44:27,338 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 199 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:27,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 443 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1022 Invalid, 0 Unknown, 97 Unchecked, 0.4s Time] [2022-01-18 15:44:27,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3342 states. [2022-01-18 15:44:27,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3342 to 2987. [2022-01-18 15:44:27,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2987 states, 2986 states have (on average 4.183523107836571) internal successors, (12492), 2986 states have internal predecessors, (12492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:27,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2987 states to 2987 states and 12492 transitions. [2022-01-18 15:44:27,383 INFO L78 Accepts]: Start accepts. Automaton has 2987 states and 12492 transitions. Word has length 23 [2022-01-18 15:44:27,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:27,383 INFO L470 AbstractCegarLoop]: Abstraction has 2987 states and 12492 transitions. [2022-01-18 15:44:27,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:27,383 INFO L276 IsEmpty]: Start isEmpty. Operand 2987 states and 12492 transitions. [2022-01-18 15:44:27,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:44:27,388 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:27,388 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:27,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-01-18 15:44:27,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-01-18 15:44:27,589 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:44:27,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:27,589 INFO L85 PathProgramCache]: Analyzing trace with hash -815520956, now seen corresponding path program 44 times [2022-01-18 15:44:27,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:27,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896707795] [2022-01-18 15:44:27,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:27,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:27,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:27,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:27,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:27,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896707795] [2022-01-18 15:44:27,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896707795] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:27,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792386079] [2022-01-18 15:44:27,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:44:27,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:27,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:27,721 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:27,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 15:44:27,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:44:27,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:27,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 15:44:27,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:27,933 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:27,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 30 [2022-01-18 15:44:28,095 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:28,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:28,282 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:28,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:44:28,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:28,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:44:28,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:28,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792386079] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:28,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:28,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:44:28,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321155516] [2022-01-18 15:44:28,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:28,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:44:28,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:28,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:44:28,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:44:28,348 INFO L87 Difference]: Start difference. First operand 2987 states and 12492 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:29,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:29,823 INFO L93 Difference]: Finished difference Result 4623 states and 18876 transitions. [2022-01-18 15:44:29,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 15:44:29,823 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:44:29,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:29,833 INFO L225 Difference]: With dead ends: 4623 [2022-01-18 15:44:29,834 INFO L226 Difference]: Without dead ends: 4580 [2022-01-18 15:44:29,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=406, Invalid=2674, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 15:44:29,834 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 379 mSDsluCounter, 1261 mSDsCounter, 0 mSdLazyCounter, 1559 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 1862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:29,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 771 Invalid, 1862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1559 Invalid, 0 Unknown, 131 Unchecked, 0.7s Time] [2022-01-18 15:44:29,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4580 states. [2022-01-18 15:44:29,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4580 to 3050. [2022-01-18 15:44:29,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3050 states, 3049 states have (on average 4.191866185634634) internal successors, (12781), 3049 states have internal predecessors, (12781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:29,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3050 states to 3050 states and 12781 transitions. [2022-01-18 15:44:29,890 INFO L78 Accepts]: Start accepts. Automaton has 3050 states and 12781 transitions. Word has length 23 [2022-01-18 15:44:29,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:29,891 INFO L470 AbstractCegarLoop]: Abstraction has 3050 states and 12781 transitions. [2022-01-18 15:44:29,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:29,891 INFO L276 IsEmpty]: Start isEmpty. Operand 3050 states and 12781 transitions. [2022-01-18 15:44:29,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:44:29,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:29,895 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:29,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-01-18 15:44:30,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:30,096 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:44:30,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:30,096 INFO L85 PathProgramCache]: Analyzing trace with hash -661083438, now seen corresponding path program 45 times [2022-01-18 15:44:30,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:30,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088641092] [2022-01-18 15:44:30,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:30,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:30,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:30,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:30,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088641092] [2022-01-18 15:44:30,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088641092] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:30,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997379605] [2022-01-18 15:44:30,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:44:30,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:30,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:30,248 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:30,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 15:44:30,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:44:30,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:30,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:44:30,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:30,495 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:30,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:44:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:30,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:30,942 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:30,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:44:30,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:30,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:44:31,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:31,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997379605] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:31,002 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:31,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:44:31,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846517641] [2022-01-18 15:44:31,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:31,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:44:31,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:31,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:44:31,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:44:31,003 INFO L87 Difference]: Start difference. First operand 3050 states and 12781 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:31,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:31,854 INFO L93 Difference]: Finished difference Result 3688 states and 15273 transitions. [2022-01-18 15:44:31,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 15:44:31,854 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:44:31,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:31,862 INFO L225 Difference]: With dead ends: 3688 [2022-01-18 15:44:31,862 INFO L226 Difference]: Without dead ends: 3679 [2022-01-18 15:44:31,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=1424, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:44:31,863 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 205 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 1374 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 1547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:31,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 578 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1374 Invalid, 0 Unknown, 126 Unchecked, 0.5s Time] [2022-01-18 15:44:31,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3679 states. [2022-01-18 15:44:31,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3679 to 3054. [2022-01-18 15:44:31,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3054 states, 3053 states have (on average 4.19226989846053) internal successors, (12799), 3053 states have internal predecessors, (12799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:31,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3054 states to 3054 states and 12799 transitions. [2022-01-18 15:44:31,908 INFO L78 Accepts]: Start accepts. Automaton has 3054 states and 12799 transitions. Word has length 23 [2022-01-18 15:44:31,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:31,908 INFO L470 AbstractCegarLoop]: Abstraction has 3054 states and 12799 transitions. [2022-01-18 15:44:31,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:31,908 INFO L276 IsEmpty]: Start isEmpty. Operand 3054 states and 12799 transitions. [2022-01-18 15:44:31,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:44:31,912 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:31,912 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:31,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-01-18 15:44:32,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-01-18 15:44:32,114 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:44:32,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:32,114 INFO L85 PathProgramCache]: Analyzing trace with hash -579684382, now seen corresponding path program 46 times [2022-01-18 15:44:32,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:32,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287112968] [2022-01-18 15:44:32,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:32,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:32,272 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:32,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:32,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287112968] [2022-01-18 15:44:32,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287112968] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:32,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674775709] [2022-01-18 15:44:32,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:44:32,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:32,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:32,276 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:32,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 15:44:32,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:44:32,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:32,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:44:32,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:32,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:32,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:44:32,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:32,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:33,003 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:33,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:44:33,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:33,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:44:33,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:33,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674775709] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:33,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:33,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:44:33,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131969795] [2022-01-18 15:44:33,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:33,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:44:33,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:33,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:44:33,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:44:33,058 INFO L87 Difference]: Start difference. First operand 3054 states and 12799 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:34,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:34,165 INFO L93 Difference]: Finished difference Result 3604 states and 14929 transitions. [2022-01-18 15:44:34,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 15:44:34,165 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:44:34,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:34,173 INFO L225 Difference]: With dead ends: 3604 [2022-01-18 15:44:34,173 INFO L226 Difference]: Without dead ends: 3595 [2022-01-18 15:44:34,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=301, Invalid=1679, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 15:44:34,173 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 330 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 1438 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 1644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:34,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 611 Invalid, 1644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1438 Invalid, 0 Unknown, 117 Unchecked, 0.6s Time] [2022-01-18 15:44:34,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3595 states. [2022-01-18 15:44:34,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3595 to 3058. [2022-01-18 15:44:34,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3058 states, 3057 states have (on average 4.1920183186130195) internal successors, (12815), 3057 states have internal predecessors, (12815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:34,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3058 states to 3058 states and 12815 transitions. [2022-01-18 15:44:34,222 INFO L78 Accepts]: Start accepts. Automaton has 3058 states and 12815 transitions. Word has length 23 [2022-01-18 15:44:34,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:34,222 INFO L470 AbstractCegarLoop]: Abstraction has 3058 states and 12815 transitions. [2022-01-18 15:44:34,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:34,222 INFO L276 IsEmpty]: Start isEmpty. Operand 3058 states and 12815 transitions. [2022-01-18 15:44:34,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:44:34,227 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:34,227 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:34,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-01-18 15:44:34,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-01-18 15:44:34,427 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:44:34,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:34,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1033882352, now seen corresponding path program 47 times [2022-01-18 15:44:34,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:34,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105366302] [2022-01-18 15:44:34,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:34,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:34,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:34,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:34,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:34,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105366302] [2022-01-18 15:44:34,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105366302] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:34,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071700729] [2022-01-18 15:44:34,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:44:34,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:34,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:34,584 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:34,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 15:44:34,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:44:34,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:34,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:44:34,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:34,768 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:34,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:44:35,170 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:35,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:35,340 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:35,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:44:35,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:35,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:44:35,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:35,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071700729] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:35,396 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:35,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:44:35,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772092359] [2022-01-18 15:44:35,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:35,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:44:35,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:35,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:44:35,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:44:35,397 INFO L87 Difference]: Start difference. First operand 3058 states and 12815 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:36,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:36,397 INFO L93 Difference]: Finished difference Result 3577 states and 14834 transitions. [2022-01-18 15:44:36,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:44:36,397 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:44:36,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:36,406 INFO L225 Difference]: With dead ends: 3577 [2022-01-18 15:44:36,406 INFO L226 Difference]: Without dead ends: 3566 [2022-01-18 15:44:36,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=267, Invalid=1539, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 15:44:36,407 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 281 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:36,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 552 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1260 Invalid, 0 Unknown, 224 Unchecked, 0.5s Time] [2022-01-18 15:44:36,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3566 states. [2022-01-18 15:44:36,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3566 to 3064. [2022-01-18 15:44:36,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3064 states, 3063 states have (on average 4.191642180868429) internal successors, (12839), 3063 states have internal predecessors, (12839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:36,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3064 states to 3064 states and 12839 transitions. [2022-01-18 15:44:36,458 INFO L78 Accepts]: Start accepts. Automaton has 3064 states and 12839 transitions. Word has length 23 [2022-01-18 15:44:36,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:36,458 INFO L470 AbstractCegarLoop]: Abstraction has 3064 states and 12839 transitions. [2022-01-18 15:44:36,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:36,458 INFO L276 IsEmpty]: Start isEmpty. Operand 3064 states and 12839 transitions. [2022-01-18 15:44:36,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:44:36,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:36,464 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:36,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-01-18 15:44:36,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-01-18 15:44:36,665 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:44:36,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:36,665 INFO L85 PathProgramCache]: Analyzing trace with hash 370110242, now seen corresponding path program 48 times [2022-01-18 15:44:36,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:36,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620780542] [2022-01-18 15:44:36,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:36,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:36,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:36,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:36,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:36,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620780542] [2022-01-18 15:44:36,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620780542] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:36,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516652560] [2022-01-18 15:44:36,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:44:36,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:36,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:36,845 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:36,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 15:44:36,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:44:36,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:36,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:44:36,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:37,071 INFO L353 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2022-01-18 15:44:37,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 81 [2022-01-18 15:44:37,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:37,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:37,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:44:37,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:37,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516652560] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:37,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:37,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 27 [2022-01-18 15:44:37,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844648081] [2022-01-18 15:44:37,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:37,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:44:37,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:37,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:44:37,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:44:37,343 INFO L87 Difference]: Start difference. First operand 3064 states and 12839 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:39,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:39,536 INFO L93 Difference]: Finished difference Result 4335 states and 17797 transitions. [2022-01-18 15:44:39,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 15:44:39,537 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:44:39,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:39,546 INFO L225 Difference]: With dead ends: 4335 [2022-01-18 15:44:39,546 INFO L226 Difference]: Without dead ends: 4282 [2022-01-18 15:44:39,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=598, Invalid=3958, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 15:44:39,547 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 464 mSDsluCounter, 1717 mSDsCounter, 0 mSdLazyCounter, 2558 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 2925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 2558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:39,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 1146 Invalid, 2925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 2558 Invalid, 0 Unknown, 179 Unchecked, 1.0s Time] [2022-01-18 15:44:39,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4282 states. [2022-01-18 15:44:39,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4282 to 3068. [2022-01-18 15:44:39,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3068 states, 3067 states have (on average 4.1930224975546135) internal successors, (12860), 3067 states have internal predecessors, (12860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:39,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3068 states to 3068 states and 12860 transitions. [2022-01-18 15:44:39,615 INFO L78 Accepts]: Start accepts. Automaton has 3068 states and 12860 transitions. Word has length 23 [2022-01-18 15:44:39,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:39,615 INFO L470 AbstractCegarLoop]: Abstraction has 3068 states and 12860 transitions. [2022-01-18 15:44:39,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:39,615 INFO L276 IsEmpty]: Start isEmpty. Operand 3068 states and 12860 transitions. [2022-01-18 15:44:39,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:44:39,620 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:39,620 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:39,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-01-18 15:44:39,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-01-18 15:44:39,820 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:44:39,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:39,821 INFO L85 PathProgramCache]: Analyzing trace with hash 495060066, now seen corresponding path program 49 times [2022-01-18 15:44:39,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:39,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733860882] [2022-01-18 15:44:39,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:39,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:39,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:39,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:39,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733860882] [2022-01-18 15:44:39,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733860882] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:39,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560476023] [2022-01-18 15:44:39,953 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:44:39,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:39,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:39,954 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:39,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 15:44:39,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:39,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:44:39,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:40,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:40,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:44:40,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:40,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:40,778 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:40,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:44:40,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:40,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:44:40,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:40,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560476023] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:40,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:40,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:44:40,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542801317] [2022-01-18 15:44:40,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:40,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:44:40,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:40,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:44:40,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=512, Unknown=1, NotChecked=0, Total=600 [2022-01-18 15:44:40,834 INFO L87 Difference]: Start difference. First operand 3068 states and 12860 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:41,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:41,519 INFO L93 Difference]: Finished difference Result 3526 states and 14627 transitions. [2022-01-18 15:44:41,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:44:41,519 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:44:41,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:41,526 INFO L225 Difference]: With dead ends: 3526 [2022-01-18 15:44:41,526 INFO L226 Difference]: Without dead ends: 3492 [2022-01-18 15:44:41,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=168, Invalid=1091, Unknown=1, NotChecked=0, Total=1260 [2022-01-18 15:44:41,526 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 180 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:41,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 408 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1150 Invalid, 0 Unknown, 62 Unchecked, 0.5s Time] [2022-01-18 15:44:41,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3492 states. [2022-01-18 15:44:41,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3492 to 3076. [2022-01-18 15:44:41,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3076 states, 3075 states have (on average 4.1934959349593495) internal successors, (12895), 3075 states have internal predecessors, (12895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:41,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3076 states to 3076 states and 12895 transitions. [2022-01-18 15:44:41,569 INFO L78 Accepts]: Start accepts. Automaton has 3076 states and 12895 transitions. Word has length 23 [2022-01-18 15:44:41,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:41,570 INFO L470 AbstractCegarLoop]: Abstraction has 3076 states and 12895 transitions. [2022-01-18 15:44:41,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:41,570 INFO L276 IsEmpty]: Start isEmpty. Operand 3076 states and 12895 transitions. [2022-01-18 15:44:41,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:44:41,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:41,574 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:41,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-01-18 15:44:41,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:41,775 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:44:41,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:41,775 INFO L85 PathProgramCache]: Analyzing trace with hash -624208832, now seen corresponding path program 50 times [2022-01-18 15:44:41,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:41,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698857075] [2022-01-18 15:44:41,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:41,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:41,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:41,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:41,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:41,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698857075] [2022-01-18 15:44:41,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698857075] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:41,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689280029] [2022-01-18 15:44:41,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:44:41,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:41,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:41,992 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:41,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 15:44:42,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:44:42,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:42,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:44:42,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:42,214 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:42,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 42 [2022-01-18 15:44:42,514 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:42,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:42,660 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:42,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 42 [2022-01-18 15:44:42,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:42,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689280029] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:42,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:42,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-01-18 15:44:42,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970879301] [2022-01-18 15:44:42,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:42,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:44:42,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:42,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:44:42,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:44:42,722 INFO L87 Difference]: Start difference. First operand 3076 states and 12895 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:43,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:43,340 INFO L93 Difference]: Finished difference Result 3535 states and 14683 transitions. [2022-01-18 15:44:43,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:44:43,340 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:44:43,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:43,348 INFO L225 Difference]: With dead ends: 3535 [2022-01-18 15:44:43,348 INFO L226 Difference]: Without dead ends: 3513 [2022-01-18 15:44:43,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=1081, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:44:43,348 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 180 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 1517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 377 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:43,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 644 Invalid, 1517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1094 Invalid, 0 Unknown, 377 Unchecked, 0.4s Time] [2022-01-18 15:44:43,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3513 states. [2022-01-18 15:44:43,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3513 to 3084. [2022-01-18 15:44:43,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3084 states, 3083 states have (on average 4.193642555951995) internal successors, (12929), 3083 states have internal predecessors, (12929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:43,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3084 states to 3084 states and 12929 transitions. [2022-01-18 15:44:43,393 INFO L78 Accepts]: Start accepts. Automaton has 3084 states and 12929 transitions. Word has length 23 [2022-01-18 15:44:43,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:43,393 INFO L470 AbstractCegarLoop]: Abstraction has 3084 states and 12929 transitions. [2022-01-18 15:44:43,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:43,393 INFO L276 IsEmpty]: Start isEmpty. Operand 3084 states and 12929 transitions. [2022-01-18 15:44:43,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:44:43,398 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:43,398 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:43,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-01-18 15:44:43,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:43,599 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:44:43,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:43,600 INFO L85 PathProgramCache]: Analyzing trace with hash -38874880, now seen corresponding path program 51 times [2022-01-18 15:44:43,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:43,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743279168] [2022-01-18 15:44:43,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:43,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:43,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:43,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743279168] [2022-01-18 15:44:43,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743279168] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:43,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355675618] [2022-01-18 15:44:43,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:44:43,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:43,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:43,794 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:43,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 15:44:43,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 15:44:43,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:43,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 15:44:43,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:43,990 INFO L353 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2022-01-18 15:44:43,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 51 [2022-01-18 15:44:44,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:44,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:44,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:44:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:44,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355675618] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:44,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:44,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 27 [2022-01-18 15:44:44,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499317911] [2022-01-18 15:44:44,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:44,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:44:44,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:44,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:44:44,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:44:44,330 INFO L87 Difference]: Start difference. First operand 3084 states and 12929 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:46,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:46,546 INFO L93 Difference]: Finished difference Result 4295 states and 17669 transitions. [2022-01-18 15:44:46,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 15:44:46,546 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:44:46,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:46,556 INFO L225 Difference]: With dead ends: 4295 [2022-01-18 15:44:46,556 INFO L226 Difference]: Without dead ends: 4241 [2022-01-18 15:44:46,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=589, Invalid=3833, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 15:44:46,557 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 369 mSDsluCounter, 1411 mSDsCounter, 0 mSdLazyCounter, 2349 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 2546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 2349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:46,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 872 Invalid, 2546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 2349 Invalid, 0 Unknown, 56 Unchecked, 1.0s Time] [2022-01-18 15:44:46,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4241 states. [2022-01-18 15:44:46,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4241 to 3184. [2022-01-18 15:44:46,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3184 states, 3183 states have (on average 4.203267357838517) internal successors, (13379), 3183 states have internal predecessors, (13379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:46,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3184 states to 3184 states and 13379 transitions. [2022-01-18 15:44:46,626 INFO L78 Accepts]: Start accepts. Automaton has 3184 states and 13379 transitions. Word has length 23 [2022-01-18 15:44:46,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:46,627 INFO L470 AbstractCegarLoop]: Abstraction has 3184 states and 13379 transitions. [2022-01-18 15:44:46,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:46,627 INFO L276 IsEmpty]: Start isEmpty. Operand 3184 states and 13379 transitions. [2022-01-18 15:44:46,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:44:46,632 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:46,632 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:46,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-01-18 15:44:46,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:46,833 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:44:46,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:46,833 INFO L85 PathProgramCache]: Analyzing trace with hash -469771314, now seen corresponding path program 52 times [2022-01-18 15:44:46,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:46,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604660138] [2022-01-18 15:44:46,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:46,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:46,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:47,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:47,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:47,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604660138] [2022-01-18 15:44:47,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604660138] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:47,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251725328] [2022-01-18 15:44:47,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:44:47,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:47,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:47,013 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:47,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-18 15:44:47,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:44:47,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:47,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:44:47,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:47,205 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:47,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:44:49,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:49,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:49,972 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:49,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 42 [2022-01-18 15:44:50,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:50,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251725328] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:50,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:50,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-01-18 15:44:50,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367498620] [2022-01-18 15:44:50,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:50,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:44:50,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:50,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:44:50,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=651, Unknown=1, NotChecked=0, Total=756 [2022-01-18 15:44:50,056 INFO L87 Difference]: Start difference. First operand 3184 states and 13379 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:50,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:50,722 INFO L93 Difference]: Finished difference Result 3623 states and 15105 transitions. [2022-01-18 15:44:50,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:44:50,723 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:44:50,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:50,730 INFO L225 Difference]: With dead ends: 3623 [2022-01-18 15:44:50,730 INFO L226 Difference]: Without dead ends: 3600 [2022-01-18 15:44:50,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=220, Invalid=1261, Unknown=1, NotChecked=0, Total=1482 [2022-01-18 15:44:50,731 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 146 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 384 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:50,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 528 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1045 Invalid, 0 Unknown, 384 Unchecked, 0.4s Time] [2022-01-18 15:44:50,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3600 states. [2022-01-18 15:44:50,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3600 to 3184. [2022-01-18 15:44:50,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3184 states, 3183 states have (on average 4.203267357838517) internal successors, (13379), 3183 states have internal predecessors, (13379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:50,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3184 states to 3184 states and 13379 transitions. [2022-01-18 15:44:50,780 INFO L78 Accepts]: Start accepts. Automaton has 3184 states and 13379 transitions. Word has length 23 [2022-01-18 15:44:50,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:50,780 INFO L470 AbstractCegarLoop]: Abstraction has 3184 states and 13379 transitions. [2022-01-18 15:44:50,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:50,780 INFO L276 IsEmpty]: Start isEmpty. Operand 3184 states and 13379 transitions. [2022-01-18 15:44:50,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:44:50,785 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:50,785 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:50,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-01-18 15:44:50,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-01-18 15:44:50,986 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:44:50,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:50,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1298904722, now seen corresponding path program 1 times [2022-01-18 15:44:50,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:50,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949449875] [2022-01-18 15:44:50,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:50,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:50,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:51,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:51,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:51,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949449875] [2022-01-18 15:44:51,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949449875] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:51,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145659817] [2022-01-18 15:44:51,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:51,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:51,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:51,180 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:51,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-18 15:44:51,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:51,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:44:51,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:51,393 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:51,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2022-01-18 15:44:51,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:51,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:51,900 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:51,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:44:51,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:51,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:44:51,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:51,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145659817] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:51,950 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:51,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:44:51,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063331198] [2022-01-18 15:44:51,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:51,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:44:51,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:51,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:44:51,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:44:51,951 INFO L87 Difference]: Start difference. First operand 3184 states and 13379 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:52,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:52,748 INFO L93 Difference]: Finished difference Result 3552 states and 14813 transitions. [2022-01-18 15:44:52,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:44:52,748 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:44:52,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:52,756 INFO L225 Difference]: With dead ends: 3552 [2022-01-18 15:44:52,756 INFO L226 Difference]: Without dead ends: 3537 [2022-01-18 15:44:52,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=146, Invalid=976, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:44:52,756 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 159 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:52,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 571 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1289 Invalid, 0 Unknown, 82 Unchecked, 0.5s Time] [2022-01-18 15:44:52,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2022-01-18 15:44:52,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 3190. [2022-01-18 15:44:52,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3190 states, 3189 states have (on average 4.203198494825965) internal successors, (13404), 3189 states have internal predecessors, (13404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:52,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3190 states to 3190 states and 13404 transitions. [2022-01-18 15:44:52,804 INFO L78 Accepts]: Start accepts. Automaton has 3190 states and 13404 transitions. Word has length 23 [2022-01-18 15:44:52,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:52,804 INFO L470 AbstractCegarLoop]: Abstraction has 3190 states and 13404 transitions. [2022-01-18 15:44:52,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:52,804 INFO L276 IsEmpty]: Start isEmpty. Operand 3190 states and 13404 transitions. [2022-01-18 15:44:52,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:44:52,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:52,809 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:52,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-01-18 15:44:53,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:53,011 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:44:53,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:53,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1433692626, now seen corresponding path program 2 times [2022-01-18 15:44:53,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:53,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909933884] [2022-01-18 15:44:53,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:53,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:53,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:53,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:53,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:53,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909933884] [2022-01-18 15:44:53,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909933884] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:53,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509730693] [2022-01-18 15:44:53,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:44:53,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:53,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:53,227 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:53,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-18 15:44:53,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:44:53,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:53,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:44:53,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:53,471 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:53,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 50 [2022-01-18 15:44:53,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:53,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:53,750 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:53,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:44:53,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:53,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:44:53,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:53,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509730693] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:53,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:53,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:44:53,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642993495] [2022-01-18 15:44:53,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:53,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:44:53,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:53,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:44:53,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:44:53,804 INFO L87 Difference]: Start difference. First operand 3190 states and 13404 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:54,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:54,514 INFO L93 Difference]: Finished difference Result 3590 states and 14961 transitions. [2022-01-18 15:44:54,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:44:54,514 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:44:54,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:54,522 INFO L225 Difference]: With dead ends: 3590 [2022-01-18 15:44:54,522 INFO L226 Difference]: Without dead ends: 3575 [2022-01-18 15:44:54,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:44:54,522 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 155 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 371 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:54,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 540 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1160 Invalid, 0 Unknown, 371 Unchecked, 0.5s Time] [2022-01-18 15:44:54,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3575 states. [2022-01-18 15:44:54,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3575 to 3204. [2022-01-18 15:44:54,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3204 states, 3203 states have (on average 4.203871370590072) internal successors, (13465), 3203 states have internal predecessors, (13465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:54,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3204 states to 3204 states and 13465 transitions. [2022-01-18 15:44:54,571 INFO L78 Accepts]: Start accepts. Automaton has 3204 states and 13465 transitions. Word has length 23 [2022-01-18 15:44:54,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:54,572 INFO L470 AbstractCegarLoop]: Abstraction has 3204 states and 13465 transitions. [2022-01-18 15:44:54,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:54,572 INFO L276 IsEmpty]: Start isEmpty. Operand 3204 states and 13465 transitions. [2022-01-18 15:44:54,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:44:54,577 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:54,577 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:54,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-01-18 15:44:54,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:54,777 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:44:54,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:54,778 INFO L85 PathProgramCache]: Analyzing trace with hash -848358674, now seen corresponding path program 3 times [2022-01-18 15:44:54,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:54,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386794292] [2022-01-18 15:44:54,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:54,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:54,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:54,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:54,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386794292] [2022-01-18 15:44:54,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386794292] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:54,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119412752] [2022-01-18 15:44:54,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:44:54,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:54,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:54,994 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:54,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-18 15:44:55,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:44:55,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:55,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:44:55,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:55,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:55,205 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 15:44:55,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 58 [2022-01-18 15:44:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:55,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:55,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:55,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119412752] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:55,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:55,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-18 15:44:55,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890009371] [2022-01-18 15:44:55,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:55,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:44:55,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:55,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:44:55,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:44:55,582 INFO L87 Difference]: Start difference. First operand 3204 states and 13465 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:57,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:44:57,567 INFO L93 Difference]: Finished difference Result 4394 states and 18106 transitions. [2022-01-18 15:44:57,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 15:44:57,567 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:44:57,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:44:57,578 INFO L225 Difference]: With dead ends: 4394 [2022-01-18 15:44:57,578 INFO L226 Difference]: Without dead ends: 4350 [2022-01-18 15:44:57,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=393, Invalid=2799, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 15:44:57,578 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 472 mSDsluCounter, 1256 mSDsCounter, 0 mSdLazyCounter, 2044 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 2229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 2044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:44:57,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 760 Invalid, 2229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 2044 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 15:44:57,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4350 states. [2022-01-18 15:44:57,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4350 to 3224. [2022-01-18 15:44:57,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3224 states, 3223 states have (on average 4.205708966801117) internal successors, (13555), 3223 states have internal predecessors, (13555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:57,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3224 states to 3224 states and 13555 transitions. [2022-01-18 15:44:57,629 INFO L78 Accepts]: Start accepts. Automaton has 3224 states and 13555 transitions. Word has length 23 [2022-01-18 15:44:57,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:44:57,630 INFO L470 AbstractCegarLoop]: Abstraction has 3224 states and 13555 transitions. [2022-01-18 15:44:57,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:44:57,630 INFO L276 IsEmpty]: Start isEmpty. Operand 3224 states and 13555 transitions. [2022-01-18 15:44:57,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:44:57,635 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:44:57,635 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:44:57,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-01-18 15:44:57,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-01-18 15:44:57,836 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:44:57,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:44:57,836 INFO L85 PathProgramCache]: Analyzing trace with hash 765208060, now seen corresponding path program 4 times [2022-01-18 15:44:57,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:44:57,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353510850] [2022-01-18 15:44:57,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:44:57,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:44:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:44:58,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:58,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:44:58,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353510850] [2022-01-18 15:44:58,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353510850] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:44:58,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791332312] [2022-01-18 15:44:58,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:44:58,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:44:58,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:44:58,052 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:44:58,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-18 15:44:58,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:44:58,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:44:58,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:44:58,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:44:58,274 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:58,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:44:58,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:58,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:44:58,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:44:58,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:44:58,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:44:58,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:44:58,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:44:58,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791332312] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:44:58,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:44:58,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:44:58,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037407987] [2022-01-18 15:44:58,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:44:58,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:44:58,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:44:58,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:44:58,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:44:58,990 INFO L87 Difference]: Start difference. First operand 3224 states and 13555 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:00,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:00,050 INFO L93 Difference]: Finished difference Result 3623 states and 15100 transitions. [2022-01-18 15:45:00,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:45:00,051 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:45:00,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:00,058 INFO L225 Difference]: With dead ends: 3623 [2022-01-18 15:45:00,058 INFO L226 Difference]: Without dead ends: 3608 [2022-01-18 15:45:00,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=248, Invalid=1312, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:45:00,059 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 212 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:00,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 494 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1189 Invalid, 0 Unknown, 136 Unchecked, 0.5s Time] [2022-01-18 15:45:00,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3608 states. [2022-01-18 15:45:00,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3608 to 3224. [2022-01-18 15:45:00,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3224 states, 3223 states have (on average 4.205088426931431) internal successors, (13553), 3223 states have internal predecessors, (13553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:00,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3224 states to 3224 states and 13553 transitions. [2022-01-18 15:45:00,107 INFO L78 Accepts]: Start accepts. Automaton has 3224 states and 13553 transitions. Word has length 23 [2022-01-18 15:45:00,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:00,107 INFO L470 AbstractCegarLoop]: Abstraction has 3224 states and 13553 transitions. [2022-01-18 15:45:00,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:00,107 INFO L276 IsEmpty]: Start isEmpty. Operand 3224 states and 13553 transitions. [2022-01-18 15:45:00,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:45:00,112 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:00,112 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:00,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-01-18 15:45:00,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-01-18 15:45:00,312 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:45:00,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:00,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1279255108, now seen corresponding path program 5 times [2022-01-18 15:45:00,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:00,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834954356] [2022-01-18 15:45:00,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:00,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:00,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:00,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:00,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:00,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834954356] [2022-01-18 15:45:00,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834954356] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:00,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368525251] [2022-01-18 15:45:00,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:45:00,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:00,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:00,478 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:00,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-18 15:45:00,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:45:00,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:00,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:45:00,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:00,680 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:00,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2022-01-18 15:45:00,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:00,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:01,152 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:01,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:45:01,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:01,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:45:01,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:01,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368525251] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:01,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:01,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:45:01,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020220575] [2022-01-18 15:45:01,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:01,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:45:01,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:01,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:45:01,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:45:01,207 INFO L87 Difference]: Start difference. First operand 3224 states and 13553 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:01,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:01,934 INFO L93 Difference]: Finished difference Result 3559 states and 14847 transitions. [2022-01-18 15:45:01,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:45:01,934 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:45:01,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:01,942 INFO L225 Difference]: With dead ends: 3559 [2022-01-18 15:45:01,942 INFO L226 Difference]: Without dead ends: 3544 [2022-01-18 15:45:01,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:45:01,942 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 157 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:01,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 510 Invalid, 1343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1144 Invalid, 0 Unknown, 148 Unchecked, 0.5s Time] [2022-01-18 15:45:01,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3544 states. [2022-01-18 15:45:01,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3544 to 3224. [2022-01-18 15:45:01,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3224 states, 3223 states have (on average 4.205088426931431) internal successors, (13553), 3223 states have internal predecessors, (13553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:02,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3224 states to 3224 states and 13553 transitions. [2022-01-18 15:45:02,021 INFO L78 Accepts]: Start accepts. Automaton has 3224 states and 13553 transitions. Word has length 23 [2022-01-18 15:45:02,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:02,021 INFO L470 AbstractCegarLoop]: Abstraction has 3224 states and 13553 transitions. [2022-01-18 15:45:02,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:02,021 INFO L276 IsEmpty]: Start isEmpty. Operand 3224 states and 13553 transitions. [2022-01-18 15:45:02,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:45:02,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:02,026 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:02,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-01-18 15:45:02,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:02,226 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:45:02,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:02,227 INFO L85 PathProgramCache]: Analyzing trace with hash -439373552, now seen corresponding path program 6 times [2022-01-18 15:45:02,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:02,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740150488] [2022-01-18 15:45:02,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:02,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:02,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:02,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:02,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:02,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740150488] [2022-01-18 15:45:02,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740150488] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:02,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075748662] [2022-01-18 15:45:02,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:45:02,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:02,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:02,426 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:02,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-18 15:45:02,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:45:02,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:02,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:45:02,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:02,657 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:02,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:45:02,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:02,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:03,130 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:03,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:45:03,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:03,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:45:03,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:03,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075748662] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:03,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:03,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:45:03,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811954251] [2022-01-18 15:45:03,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:03,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:45:03,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:03,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:45:03,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:45:03,190 INFO L87 Difference]: Start difference. First operand 3224 states and 13553 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:03,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:03,991 INFO L93 Difference]: Finished difference Result 3892 states and 16164 transitions. [2022-01-18 15:45:03,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:45:03,991 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:45:03,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:03,999 INFO L225 Difference]: With dead ends: 3892 [2022-01-18 15:45:03,999 INFO L226 Difference]: Without dead ends: 3870 [2022-01-18 15:45:04,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=195, Invalid=1137, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:45:04,000 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 230 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 1433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:04,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 585 Invalid, 1433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1317 Invalid, 0 Unknown, 46 Unchecked, 0.5s Time] [2022-01-18 15:45:04,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3870 states. [2022-01-18 15:45:04,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3870 to 3244. [2022-01-18 15:45:04,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3244 states, 3243 states have (on average 4.2069071847055195) internal successors, (13643), 3243 states have internal predecessors, (13643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:04,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3244 states to 3244 states and 13643 transitions. [2022-01-18 15:45:04,051 INFO L78 Accepts]: Start accepts. Automaton has 3244 states and 13643 transitions. Word has length 23 [2022-01-18 15:45:04,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:04,051 INFO L470 AbstractCegarLoop]: Abstraction has 3244 states and 13643 transitions. [2022-01-18 15:45:04,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:04,051 INFO L276 IsEmpty]: Start isEmpty. Operand 3244 states and 13643 transitions. [2022-01-18 15:45:04,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:45:04,056 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:04,056 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:04,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-01-18 15:45:04,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:04,256 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:45:04,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:04,257 INFO L85 PathProgramCache]: Analyzing trace with hash 145960400, now seen corresponding path program 7 times [2022-01-18 15:45:04,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:04,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466739655] [2022-01-18 15:45:04,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:04,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:04,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:04,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:04,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:04,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466739655] [2022-01-18 15:45:04,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466739655] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:04,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700117356] [2022-01-18 15:45:04,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:45:04,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:04,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:04,436 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:04,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-18 15:45:04,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:04,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:45:04,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:04,597 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:04,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:45:04,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:04,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:05,112 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:05,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:45:05,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:05,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:45:05,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:05,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700117356] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:05,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:05,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:45:05,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527378643] [2022-01-18 15:45:05,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:05,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:45:05,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:05,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:45:05,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:45:05,165 INFO L87 Difference]: Start difference. First operand 3244 states and 13643 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:06,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:06,016 INFO L93 Difference]: Finished difference Result 3827 states and 15901 transitions. [2022-01-18 15:45:06,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:45:06,017 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:45:06,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:06,025 INFO L225 Difference]: With dead ends: 3827 [2022-01-18 15:45:06,025 INFO L226 Difference]: Without dead ends: 3801 [2022-01-18 15:45:06,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=211, Invalid=1049, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:45:06,026 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 246 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 1376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:06,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 499 Invalid, 1376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1166 Invalid, 0 Unknown, 130 Unchecked, 0.5s Time] [2022-01-18 15:45:06,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2022-01-18 15:45:06,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 3248. [2022-01-18 15:45:06,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3248 states, 3247 states have (on average 4.2066522944256235) internal successors, (13659), 3247 states have internal predecessors, (13659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:06,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 13659 transitions. [2022-01-18 15:45:06,076 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 13659 transitions. Word has length 23 [2022-01-18 15:45:06,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:06,077 INFO L470 AbstractCegarLoop]: Abstraction has 3248 states and 13659 transitions. [2022-01-18 15:45:06,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:06,077 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 13659 transitions. [2022-01-18 15:45:06,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:45:06,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:06,082 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:06,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:06,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-01-18 15:45:06,282 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:45:06,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:06,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1759527134, now seen corresponding path program 8 times [2022-01-18 15:45:06,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:06,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002489231] [2022-01-18 15:45:06,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:06,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:06,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:06,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:06,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002489231] [2022-01-18 15:45:06,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002489231] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:06,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399876544] [2022-01-18 15:45:06,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:45:06,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:06,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:06,486 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:06,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-18 15:45:06,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:45:06,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:06,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:45:06,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:06,646 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:06,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:45:07,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:07,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:07,263 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:07,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:45:07,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:07,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:45:07,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:07,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399876544] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:07,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:07,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:45:07,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227152611] [2022-01-18 15:45:07,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:07,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:45:07,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:07,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:45:07,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:45:07,323 INFO L87 Difference]: Start difference. First operand 3248 states and 13659 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:08,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:08,201 INFO L93 Difference]: Finished difference Result 3767 states and 15663 transitions. [2022-01-18 15:45:08,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:45:08,202 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:45:08,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:08,209 INFO L225 Difference]: With dead ends: 3767 [2022-01-18 15:45:08,209 INFO L226 Difference]: Without dead ends: 3746 [2022-01-18 15:45:08,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=240, Invalid=1166, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:45:08,210 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 226 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 1349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:08,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 533 Invalid, 1349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1139 Invalid, 0 Unknown, 143 Unchecked, 0.5s Time] [2022-01-18 15:45:08,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3746 states. [2022-01-18 15:45:08,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3746 to 3240. [2022-01-18 15:45:08,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3240 states, 3239 states have (on average 4.2065452300092625) internal successors, (13625), 3239 states have internal predecessors, (13625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:08,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3240 states to 3240 states and 13625 transitions. [2022-01-18 15:45:08,263 INFO L78 Accepts]: Start accepts. Automaton has 3240 states and 13625 transitions. Word has length 23 [2022-01-18 15:45:08,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:08,263 INFO L470 AbstractCegarLoop]: Abstraction has 3240 states and 13625 transitions. [2022-01-18 15:45:08,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:08,263 INFO L276 IsEmpty]: Start isEmpty. Operand 3240 states and 13625 transitions. [2022-01-18 15:45:08,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:45:08,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:08,269 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:08,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-01-18 15:45:08,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:08,469 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:45:08,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:08,470 INFO L85 PathProgramCache]: Analyzing trace with hash -89876174, now seen corresponding path program 9 times [2022-01-18 15:45:08,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:08,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852580906] [2022-01-18 15:45:08,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:08,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:08,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:08,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:08,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:08,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852580906] [2022-01-18 15:45:08,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852580906] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:08,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751928767] [2022-01-18 15:45:08,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:45:08,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:08,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:08,638 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:08,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-18 15:45:08,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:45:08,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:08,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 15:45:08,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:08,839 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:08,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 30 [2022-01-18 15:45:09,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:09,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:09,171 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:09,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:45:09,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:09,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:45:09,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:09,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751928767] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:09,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:09,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:45:09,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621680706] [2022-01-18 15:45:09,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:09,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:45:09,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:09,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:45:09,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:45:09,227 INFO L87 Difference]: Start difference. First operand 3240 states and 13625 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:10,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:10,082 INFO L93 Difference]: Finished difference Result 4017 states and 16647 transitions. [2022-01-18 15:45:10,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:45:10,083 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:45:10,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:10,092 INFO L225 Difference]: With dead ends: 4017 [2022-01-18 15:45:10,092 INFO L226 Difference]: Without dead ends: 3986 [2022-01-18 15:45:10,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:45:10,092 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 238 mSDsluCounter, 1118 mSDsCounter, 0 mSdLazyCounter, 1617 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 1868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:10,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 676 Invalid, 1868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1617 Invalid, 0 Unknown, 187 Unchecked, 0.6s Time] [2022-01-18 15:45:10,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3986 states. [2022-01-18 15:45:10,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3986 to 3255. [2022-01-18 15:45:10,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3255 states, 3254 states have (on average 4.20620774431469) internal successors, (13687), 3254 states have internal predecessors, (13687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:10,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 13687 transitions. [2022-01-18 15:45:10,143 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 13687 transitions. Word has length 23 [2022-01-18 15:45:10,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:10,143 INFO L470 AbstractCegarLoop]: Abstraction has 3255 states and 13687 transitions. [2022-01-18 15:45:10,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:10,143 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 13687 transitions. [2022-01-18 15:45:10,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:45:10,148 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:10,148 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:10,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-01-18 15:45:10,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:10,349 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:45:10,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:10,349 INFO L85 PathProgramCache]: Analyzing trace with hash -8477118, now seen corresponding path program 10 times [2022-01-18 15:45:10,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:10,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693135692] [2022-01-18 15:45:10,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:10,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:10,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:10,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:10,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:10,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693135692] [2022-01-18 15:45:10,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693135692] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:10,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788435048] [2022-01-18 15:45:10,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:45:10,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:10,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:10,527 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:10,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-18 15:45:10,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:45:10,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:10,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:45:10,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:10,686 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:10,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:45:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:11,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:11,193 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:11,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:45:11,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:11,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:45:11,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:11,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788435048] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:11,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:11,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:45:11,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173845883] [2022-01-18 15:45:11,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:11,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:45:11,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:11,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:45:11,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:45:11,254 INFO L87 Difference]: Start difference. First operand 3255 states and 13687 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:12,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:12,268 INFO L93 Difference]: Finished difference Result 3847 states and 15979 transitions. [2022-01-18 15:45:12,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:45:12,269 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:45:12,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:12,277 INFO L225 Difference]: With dead ends: 3847 [2022-01-18 15:45:12,277 INFO L226 Difference]: Without dead ends: 3821 [2022-01-18 15:45:12,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:45:12,277 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 269 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 1447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:12,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 468 Invalid, 1447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1161 Invalid, 0 Unknown, 201 Unchecked, 0.5s Time] [2022-01-18 15:45:12,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3821 states. [2022-01-18 15:45:12,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3821 to 3259. [2022-01-18 15:45:12,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3259 states, 3258 states have (on average 4.2059545733578885) internal successors, (13703), 3258 states have internal predecessors, (13703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:12,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3259 states to 3259 states and 13703 transitions. [2022-01-18 15:45:12,345 INFO L78 Accepts]: Start accepts. Automaton has 3259 states and 13703 transitions. Word has length 23 [2022-01-18 15:45:12,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:12,345 INFO L470 AbstractCegarLoop]: Abstraction has 3259 states and 13703 transitions. [2022-01-18 15:45:12,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:12,345 INFO L276 IsEmpty]: Start isEmpty. Operand 3259 states and 13703 transitions. [2022-01-18 15:45:12,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:45:12,350 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:12,350 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:12,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-01-18 15:45:12,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-01-18 15:45:12,551 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:45:12,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:12,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1605089616, now seen corresponding path program 11 times [2022-01-18 15:45:12,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:12,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36955081] [2022-01-18 15:45:12,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:12,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:12,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:12,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:12,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36955081] [2022-01-18 15:45:12,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36955081] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:12,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980743971] [2022-01-18 15:45:12,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:45:12,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:12,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:12,723 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:12,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-18 15:45:12,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:45:12,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:12,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:45:12,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:12,885 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:12,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 52 [2022-01-18 15:45:13,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:13,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:13,179 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:13,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:45:13,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:13,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:45:13,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:13,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980743971] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:13,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:13,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:45:13,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430962844] [2022-01-18 15:45:13,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:13,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:45:13,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:13,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:45:13,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:45:13,244 INFO L87 Difference]: Start difference. First operand 3259 states and 13703 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:14,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:14,648 INFO L93 Difference]: Finished difference Result 3903 states and 16229 transitions. [2022-01-18 15:45:14,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:45:14,648 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:45:14,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:14,656 INFO L225 Difference]: With dead ends: 3903 [2022-01-18 15:45:14,657 INFO L226 Difference]: Without dead ends: 3882 [2022-01-18 15:45:14,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=203, Invalid=917, Unknown=2, NotChecked=0, Total=1122 [2022-01-18 15:45:14,657 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 229 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:14,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 365 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 718 Invalid, 0 Unknown, 81 Unchecked, 0.3s Time] [2022-01-18 15:45:14,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3882 states. [2022-01-18 15:45:14,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3882 to 3259. [2022-01-18 15:45:14,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3259 states, 3258 states have (on average 4.2059545733578885) internal successors, (13703), 3258 states have internal predecessors, (13703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:14,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3259 states to 3259 states and 13703 transitions. [2022-01-18 15:45:14,706 INFO L78 Accepts]: Start accepts. Automaton has 3259 states and 13703 transitions. Word has length 23 [2022-01-18 15:45:14,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:14,707 INFO L470 AbstractCegarLoop]: Abstraction has 3259 states and 13703 transitions. [2022-01-18 15:45:14,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:14,707 INFO L276 IsEmpty]: Start isEmpty. Operand 3259 states and 13703 transitions. [2022-01-18 15:45:14,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:45:14,712 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:14,712 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:14,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-01-18 15:45:14,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:14,912 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:45:14,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:14,912 INFO L85 PathProgramCache]: Analyzing trace with hash 475707936, now seen corresponding path program 12 times [2022-01-18 15:45:14,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:14,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696828937] [2022-01-18 15:45:14,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:14,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:15,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:15,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:15,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696828937] [2022-01-18 15:45:15,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696828937] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:15,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097245065] [2022-01-18 15:45:15,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:45:15,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:15,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:15,119 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:15,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-18 15:45:15,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:45:15,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:15,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:45:15,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:15,314 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:15,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2022-01-18 15:45:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:15,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:15,827 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:15,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:45:15,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:15,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:45:15,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:15,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097245065] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:15,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:15,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:45:15,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203250495] [2022-01-18 15:45:15,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:15,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:45:15,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:15,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:45:15,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:45:15,879 INFO L87 Difference]: Start difference. First operand 3259 states and 13703 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:16,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:16,731 INFO L93 Difference]: Finished difference Result 3735 states and 15541 transitions. [2022-01-18 15:45:16,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:45:16,731 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:45:16,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:16,739 INFO L225 Difference]: With dead ends: 3735 [2022-01-18 15:45:16,739 INFO L226 Difference]: Without dead ends: 3713 [2022-01-18 15:45:16,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:45:16,739 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 227 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:16,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 569 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1405 Invalid, 0 Unknown, 93 Unchecked, 0.6s Time] [2022-01-18 15:45:16,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3713 states. [2022-01-18 15:45:16,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3713 to 3267. [2022-01-18 15:45:16,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3267 states, 3266 states have (on average 4.206062461726883) internal successors, (13737), 3266 states have internal predecessors, (13737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:16,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 13737 transitions. [2022-01-18 15:45:16,788 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 13737 transitions. Word has length 23 [2022-01-18 15:45:16,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:16,789 INFO L470 AbstractCegarLoop]: Abstraction has 3267 states and 13737 transitions. [2022-01-18 15:45:16,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:16,789 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 13737 transitions. [2022-01-18 15:45:16,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:45:16,794 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:16,794 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:16,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-01-18 15:45:16,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:16,995 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:45:16,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:16,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1061041888, now seen corresponding path program 13 times [2022-01-18 15:45:16,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:16,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789514568] [2022-01-18 15:45:16,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:16,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:17,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:17,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:17,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789514568] [2022-01-18 15:45:17,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789514568] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:17,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680458064] [2022-01-18 15:45:17,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:45:17,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:17,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:17,218 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:17,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-18 15:45:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:17,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:45:17,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:17,440 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:17,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:45:17,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:17,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:18,054 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:18,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:45:18,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:18,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:45:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:18,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680458064] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:18,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:18,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:45:18,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592864435] [2022-01-18 15:45:18,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:18,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:45:18,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:18,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:45:18,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:45:18,124 INFO L87 Difference]: Start difference. First operand 3267 states and 13737 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:19,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:19,257 INFO L93 Difference]: Finished difference Result 3682 states and 15330 transitions. [2022-01-18 15:45:19,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:45:19,257 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:45:19,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:19,266 INFO L225 Difference]: With dead ends: 3682 [2022-01-18 15:45:19,266 INFO L226 Difference]: Without dead ends: 3656 [2022-01-18 15:45:19,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=230, Invalid=1330, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:45:19,266 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 194 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 1597 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 1807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:19,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 661 Invalid, 1807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1597 Invalid, 0 Unknown, 129 Unchecked, 0.6s Time] [2022-01-18 15:45:19,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3656 states. [2022-01-18 15:45:19,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3656 to 3267. [2022-01-18 15:45:19,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3267 states, 3266 states have (on average 4.206062461726883) internal successors, (13737), 3266 states have internal predecessors, (13737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:19,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 13737 transitions. [2022-01-18 15:45:19,319 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 13737 transitions. Word has length 23 [2022-01-18 15:45:19,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:19,320 INFO L470 AbstractCegarLoop]: Abstraction has 3267 states and 13737 transitions. [2022-01-18 15:45:19,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:19,320 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 13737 transitions. [2022-01-18 15:45:19,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:45:19,326 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:19,326 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:19,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:19,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:19,527 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:45:19,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:19,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1620358674, now seen corresponding path program 14 times [2022-01-18 15:45:19,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:19,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664835479] [2022-01-18 15:45:19,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:19,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:19,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:19,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664835479] [2022-01-18 15:45:19,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664835479] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:19,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257892834] [2022-01-18 15:45:19,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:45:19,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:19,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:19,740 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:19,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-18 15:45:19,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:45:19,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:19,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:45:19,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:19,913 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:19,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:45:20,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:20,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:20,744 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:20,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:45:20,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:20,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:45:20,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:20,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257892834] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:20,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:20,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:45:20,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770540694] [2022-01-18 15:45:20,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:20,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:45:20,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:20,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:45:20,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:45:20,815 INFO L87 Difference]: Start difference. First operand 3267 states and 13737 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:21,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:21,530 INFO L93 Difference]: Finished difference Result 3587 states and 14954 transitions. [2022-01-18 15:45:21,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:45:21,530 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:45:21,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:21,537 INFO L225 Difference]: With dead ends: 3587 [2022-01-18 15:45:21,538 INFO L226 Difference]: Without dead ends: 3566 [2022-01-18 15:45:21,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=165, Invalid=957, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:45:21,538 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 141 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:21,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 441 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 977 Invalid, 0 Unknown, 132 Unchecked, 0.4s Time] [2022-01-18 15:45:21,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3566 states. [2022-01-18 15:45:21,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3566 to 3263. [2022-01-18 15:45:21,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3262 states have (on average 4.20570202329859) internal successors, (13719), 3262 states have internal predecessors, (13719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:21,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 13719 transitions. [2022-01-18 15:45:21,588 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 13719 transitions. Word has length 23 [2022-01-18 15:45:21,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:21,588 INFO L470 AbstractCegarLoop]: Abstraction has 3263 states and 13719 transitions. [2022-01-18 15:45:21,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:21,588 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 13719 transitions. [2022-01-18 15:45:21,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:45:21,593 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:21,593 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:21,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:21,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:21,794 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:45:21,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:21,794 INFO L85 PathProgramCache]: Analyzing trace with hash 630145454, now seen corresponding path program 15 times [2022-01-18 15:45:21,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:21,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280556246] [2022-01-18 15:45:21,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:21,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:21,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:21,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:21,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280556246] [2022-01-18 15:45:21,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280556246] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:21,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999810686] [2022-01-18 15:45:21,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:45:21,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:21,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:21,955 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:21,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-18 15:45:21,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:45:21,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:21,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 15:45:21,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:22,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:22,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:22,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:22,199 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:22,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-01-18 15:45:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:22,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:22,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:22,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:45:22,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:22,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:45:22,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:22,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999810686] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:22,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:22,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:45:22,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120753376] [2022-01-18 15:45:22,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:22,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:45:22,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:22,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:45:22,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:45:22,559 INFO L87 Difference]: Start difference. First operand 3263 states and 13719 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:23,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:23,310 INFO L93 Difference]: Finished difference Result 3607 states and 15038 transitions. [2022-01-18 15:45:23,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:45:23,310 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:45:23,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:23,318 INFO L225 Difference]: With dead ends: 3607 [2022-01-18 15:45:23,318 INFO L226 Difference]: Without dead ends: 3584 [2022-01-18 15:45:23,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:45:23,318 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 153 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 1504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:23,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 561 Invalid, 1504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1461 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 15:45:23,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3584 states. [2022-01-18 15:45:23,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3584 to 3263. [2022-01-18 15:45:23,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3262 states have (on average 4.20570202329859) internal successors, (13719), 3262 states have internal predecessors, (13719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:23,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 13719 transitions. [2022-01-18 15:45:23,387 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 13719 transitions. Word has length 23 [2022-01-18 15:45:23,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:23,387 INFO L470 AbstractCegarLoop]: Abstraction has 3263 states and 13719 transitions. [2022-01-18 15:45:23,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:23,387 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 13719 transitions. [2022-01-18 15:45:23,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:45:23,392 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:23,392 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:23,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-01-18 15:45:23,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:23,593 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:45:23,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:23,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1608187924, now seen corresponding path program 7 times [2022-01-18 15:45:23,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:23,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175464161] [2022-01-18 15:45:23,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:23,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:23,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:23,768 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:23,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:23,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175464161] [2022-01-18 15:45:23,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175464161] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:23,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117817410] [2022-01-18 15:45:23,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:45:23,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:23,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:23,770 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:23,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-18 15:45:23,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:23,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:45:23,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:23,961 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:23,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 45 [2022-01-18 15:45:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:24,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:24,423 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:24,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:45:24,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:24,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:45:24,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:24,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117817410] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:24,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:24,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 15:45:24,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356481737] [2022-01-18 15:45:24,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:24,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:45:24,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:24,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:45:24,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:45:24,477 INFO L87 Difference]: Start difference. First operand 3263 states and 13719 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:25,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:25,377 INFO L93 Difference]: Finished difference Result 3634 states and 15150 transitions. [2022-01-18 15:45:25,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:45:25,377 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:45:25,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:25,384 INFO L225 Difference]: With dead ends: 3634 [2022-01-18 15:45:25,385 INFO L226 Difference]: Without dead ends: 3617 [2022-01-18 15:45:25,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:45:25,385 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 172 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 1065 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:25,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 415 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1065 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:45:25,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3617 states. [2022-01-18 15:45:25,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3617 to 3292. [2022-01-18 15:45:25,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3292 states, 3291 states have (on average 4.205408690367669) internal successors, (13840), 3291 states have internal predecessors, (13840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:25,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3292 states to 3292 states and 13840 transitions. [2022-01-18 15:45:25,431 INFO L78 Accepts]: Start accepts. Automaton has 3292 states and 13840 transitions. Word has length 23 [2022-01-18 15:45:25,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:25,431 INFO L470 AbstractCegarLoop]: Abstraction has 3292 states and 13840 transitions. [2022-01-18 15:45:25,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:25,431 INFO L276 IsEmpty]: Start isEmpty. Operand 3292 states and 13840 transitions. [2022-01-18 15:45:25,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:45:25,436 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:25,436 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:25,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:25,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-01-18 15:45:25,637 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:45:25,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:25,637 INFO L85 PathProgramCache]: Analyzing trace with hash -2030122192, now seen corresponding path program 8 times [2022-01-18 15:45:25,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:25,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59650360] [2022-01-18 15:45:25,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:25,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:25,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:25,794 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:25,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:25,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59650360] [2022-01-18 15:45:25,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59650360] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:25,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049603270] [2022-01-18 15:45:25,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:45:25,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:25,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:25,795 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:25,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-18 15:45:25,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:45:25,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:25,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 15:45:25,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:26,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:26,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:26,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:45:26,054 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:26,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-01-18 15:45:26,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:26,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:26,393 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:26,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:45:26,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:26,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:45:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:26,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049603270] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:26,444 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:26,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:45:26,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967617611] [2022-01-18 15:45:26,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:26,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:45:26,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:26,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:45:26,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:45:26,444 INFO L87 Difference]: Start difference. First operand 3292 states and 13840 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:27,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:27,326 INFO L93 Difference]: Finished difference Result 3875 states and 16090 transitions. [2022-01-18 15:45:27,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:45:27,326 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:45:27,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:27,334 INFO L225 Difference]: With dead ends: 3875 [2022-01-18 15:45:27,334 INFO L226 Difference]: Without dead ends: 3834 [2022-01-18 15:45:27,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=202, Invalid=1204, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:45:27,335 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 231 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 1227 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:27,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 484 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1227 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:45:27,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3834 states. [2022-01-18 15:45:27,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3834 to 3324. [2022-01-18 15:45:27,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3324 states, 3323 states have (on average 4.204935299428228) internal successors, (13973), 3323 states have internal predecessors, (13973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:27,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3324 states to 3324 states and 13973 transitions. [2022-01-18 15:45:27,383 INFO L78 Accepts]: Start accepts. Automaton has 3324 states and 13973 transitions. Word has length 23 [2022-01-18 15:45:27,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:27,383 INFO L470 AbstractCegarLoop]: Abstraction has 3324 states and 13973 transitions. [2022-01-18 15:45:27,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:27,383 INFO L276 IsEmpty]: Start isEmpty. Operand 3324 states and 13973 transitions. [2022-01-18 15:45:27,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:45:27,388 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:27,388 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:27,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:27,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-01-18 15:45:27,588 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:45:27,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:27,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1358684144, now seen corresponding path program 9 times [2022-01-18 15:45:27,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:27,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742144667] [2022-01-18 15:45:27,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:27,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:27,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:27,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:27,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:27,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742144667] [2022-01-18 15:45:27,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742144667] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:27,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924647212] [2022-01-18 15:45:27,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:45:27,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:27,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:27,781 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:27,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-18 15:45:27,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:45:27,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:27,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:45:27,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:27,975 INFO L353 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2022-01-18 15:45:27,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 51 [2022-01-18 15:45:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:28,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:28,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:28,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924647212] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:28,342 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:28,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-18 15:45:28,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713855928] [2022-01-18 15:45:28,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:28,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:45:28,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:28,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:45:28,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:45:28,342 INFO L87 Difference]: Start difference. First operand 3324 states and 13973 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:30,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:30,566 INFO L93 Difference]: Finished difference Result 4966 states and 20471 transitions. [2022-01-18 15:45:30,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 15:45:30,567 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:45:30,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:30,578 INFO L225 Difference]: With dead ends: 4966 [2022-01-18 15:45:30,578 INFO L226 Difference]: Without dead ends: 4910 [2022-01-18 15:45:30,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=530, Invalid=3760, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 15:45:30,579 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 545 mSDsluCounter, 1457 mSDsCounter, 0 mSdLazyCounter, 2219 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 2432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 2219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:30,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 859 Invalid, 2432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 2219 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 15:45:30,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4910 states. [2022-01-18 15:45:30,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4910 to 3399. [2022-01-18 15:45:30,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3399 states, 3398 states have (on average 4.212772218952325) internal successors, (14315), 3398 states have internal predecessors, (14315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:30,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3399 states to 3399 states and 14315 transitions. [2022-01-18 15:45:30,640 INFO L78 Accepts]: Start accepts. Automaton has 3399 states and 14315 transitions. Word has length 23 [2022-01-18 15:45:30,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:30,640 INFO L470 AbstractCegarLoop]: Abstraction has 3399 states and 14315 transitions. [2022-01-18 15:45:30,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:30,640 INFO L276 IsEmpty]: Start isEmpty. Operand 3399 states and 14315 transitions. [2022-01-18 15:45:30,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:45:30,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:30,646 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:30,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-01-18 15:45:30,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:30,846 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:45:30,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:30,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1860571996, now seen corresponding path program 10 times [2022-01-18 15:45:30,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:30,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394892916] [2022-01-18 15:45:30,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:30,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:30,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:31,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:31,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394892916] [2022-01-18 15:45:31,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394892916] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:31,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723639610] [2022-01-18 15:45:31,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:45:31,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:31,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:31,007 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:31,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-18 15:45:31,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:45:31,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:31,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:45:31,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:31,187 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:31,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 40 [2022-01-18 15:45:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:31,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:31,767 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:31,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:45:31,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:31,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:45:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:31,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723639610] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:31,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:31,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:45:31,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317329555] [2022-01-18 15:45:31,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:31,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:45:31,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:31,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:45:31,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:45:31,818 INFO L87 Difference]: Start difference. First operand 3399 states and 14315 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:33,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:33,400 INFO L93 Difference]: Finished difference Result 4102 states and 17044 transitions. [2022-01-18 15:45:33,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 15:45:33,400 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:45:33,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:33,409 INFO L225 Difference]: With dead ends: 4102 [2022-01-18 15:45:33,409 INFO L226 Difference]: Without dead ends: 4056 [2022-01-18 15:45:33,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=325, Invalid=1655, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 15:45:33,410 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 308 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:33,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 465 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1208 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 15:45:33,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4056 states. [2022-01-18 15:45:33,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4056 to 3441. [2022-01-18 15:45:33,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3441 states, 3440 states have (on average 4.214244186046511) internal successors, (14497), 3440 states have internal predecessors, (14497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:33,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3441 states to 3441 states and 14497 transitions. [2022-01-18 15:45:33,462 INFO L78 Accepts]: Start accepts. Automaton has 3441 states and 14497 transitions. Word has length 23 [2022-01-18 15:45:33,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:33,462 INFO L470 AbstractCegarLoop]: Abstraction has 3441 states and 14497 transitions. [2022-01-18 15:45:33,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:33,463 INFO L276 IsEmpty]: Start isEmpty. Operand 3441 states and 14497 transitions. [2022-01-18 15:45:33,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:45:33,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:33,468 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:33,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:33,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:33,668 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:45:33,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:33,669 INFO L85 PathProgramCache]: Analyzing trace with hash 936147684, now seen corresponding path program 11 times [2022-01-18 15:45:33,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:33,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612667198] [2022-01-18 15:45:33,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:33,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:33,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:33,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:33,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612667198] [2022-01-18 15:45:33,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612667198] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:33,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921715298] [2022-01-18 15:45:33,858 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:45:33,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:33,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:33,859 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:33,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-18 15:45:33,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:45:33,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:33,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:45:33,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:34,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:34,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 41 [2022-01-18 15:45:34,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:34,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:34,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:34,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:45:34,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:34,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:45:34,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:34,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921715298] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:34,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:34,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:45:34,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290725576] [2022-01-18 15:45:34,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:34,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:45:34,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:34,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:45:34,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:45:34,529 INFO L87 Difference]: Start difference. First operand 3441 states and 14497 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:35,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:35,517 INFO L93 Difference]: Finished difference Result 3932 states and 16416 transitions. [2022-01-18 15:45:35,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:45:35,517 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:45:35,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:35,525 INFO L225 Difference]: With dead ends: 3932 [2022-01-18 15:45:35,525 INFO L226 Difference]: Without dead ends: 3907 [2022-01-18 15:45:35,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:45:35,526 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 197 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:35,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 459 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1167 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:45:35,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2022-01-18 15:45:35,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 3447. [2022-01-18 15:45:35,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 3446 states have (on average 4.2147417295414975) internal successors, (14524), 3446 states have internal predecessors, (14524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:35,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 14524 transitions. [2022-01-18 15:45:35,578 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 14524 transitions. Word has length 23 [2022-01-18 15:45:35,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:35,578 INFO L470 AbstractCegarLoop]: Abstraction has 3447 states and 14524 transitions. [2022-01-18 15:45:35,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:35,578 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 14524 transitions. [2022-01-18 15:45:35,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:45:35,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:35,583 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:35,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-01-18 15:45:35,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:35,784 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:45:35,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:35,784 INFO L85 PathProgramCache]: Analyzing trace with hash 921284856, now seen corresponding path program 12 times [2022-01-18 15:45:35,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:35,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989420123] [2022-01-18 15:45:35,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:35,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:35,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:35,931 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:35,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:35,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989420123] [2022-01-18 15:45:35,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989420123] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:35,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296398835] [2022-01-18 15:45:35,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:45:35,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:35,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:35,932 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:35,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-18 15:45:35,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:45:35,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:35,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:45:35,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:36,108 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:36,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:45:36,442 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:36,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:36,567 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:36,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:45:36,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:36,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:45:36,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:36,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296398835] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:36,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:36,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:45:36,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436952497] [2022-01-18 15:45:36,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:36,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:45:36,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:36,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:45:36,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:45:36,619 INFO L87 Difference]: Start difference. First operand 3447 states and 14524 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:37,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:37,484 INFO L93 Difference]: Finished difference Result 4240 states and 17590 transitions. [2022-01-18 15:45:37,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:45:37,484 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:45:37,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:37,493 INFO L225 Difference]: With dead ends: 4240 [2022-01-18 15:45:37,494 INFO L226 Difference]: Without dead ends: 4205 [2022-01-18 15:45:37,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=1072, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:45:37,494 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 240 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 1433 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 1721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 229 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:37,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 585 Invalid, 1721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1433 Invalid, 0 Unknown, 229 Unchecked, 0.6s Time] [2022-01-18 15:45:37,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4205 states. [2022-01-18 15:45:37,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4205 to 3458. [2022-01-18 15:45:37,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3458 states, 3457 states have (on average 4.2157940410760775) internal successors, (14574), 3457 states have internal predecessors, (14574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:37,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3458 states to 3458 states and 14574 transitions. [2022-01-18 15:45:37,550 INFO L78 Accepts]: Start accepts. Automaton has 3458 states and 14574 transitions. Word has length 23 [2022-01-18 15:45:37,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:37,550 INFO L470 AbstractCegarLoop]: Abstraction has 3458 states and 14574 transitions. [2022-01-18 15:45:37,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:37,550 INFO L276 IsEmpty]: Start isEmpty. Operand 3458 states and 14574 transitions. [2022-01-18 15:45:37,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:45:37,556 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:37,556 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:37,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:37,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:37,758 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:45:37,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:37,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1509030178, now seen corresponding path program 13 times [2022-01-18 15:45:37,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:37,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044839062] [2022-01-18 15:45:37,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:37,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:37,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:37,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:37,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044839062] [2022-01-18 15:45:37,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044839062] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:37,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519998345] [2022-01-18 15:45:37,953 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:45:37,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:37,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:37,955 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:37,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-01-18 15:45:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:37,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:45:37,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:38,159 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:38,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:45:38,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:38,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:38,695 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:38,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:45:38,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:38,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:45:38,763 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:38,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519998345] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:38,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:38,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:45:38,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425626666] [2022-01-18 15:45:38,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:38,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:45:38,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:38,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:45:38,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:45:38,764 INFO L87 Difference]: Start difference. First operand 3458 states and 14574 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:39,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:39,587 INFO L93 Difference]: Finished difference Result 4026 states and 16764 transitions. [2022-01-18 15:45:39,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:45:39,587 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:45:39,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:39,596 INFO L225 Difference]: With dead ends: 4026 [2022-01-18 15:45:39,596 INFO L226 Difference]: Without dead ends: 3998 [2022-01-18 15:45:39,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=223, Invalid=1109, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:45:39,596 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 255 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:39,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 441 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 973 Invalid, 0 Unknown, 127 Unchecked, 0.4s Time] [2022-01-18 15:45:39,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3998 states. [2022-01-18 15:45:39,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3998 to 3464. [2022-01-18 15:45:39,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3464 states, 3463 states have (on average 4.2154201559341615) internal successors, (14598), 3463 states have internal predecessors, (14598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:39,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3464 states to 3464 states and 14598 transitions. [2022-01-18 15:45:39,649 INFO L78 Accepts]: Start accepts. Automaton has 3464 states and 14598 transitions. Word has length 23 [2022-01-18 15:45:39,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:39,649 INFO L470 AbstractCegarLoop]: Abstraction has 3464 states and 14598 transitions. [2022-01-18 15:45:39,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:39,650 INFO L276 IsEmpty]: Start isEmpty. Operand 3464 states and 14598 transitions. [2022-01-18 15:45:39,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:45:39,655 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:39,655 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:39,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:39,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:39,855 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:45:39,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:39,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1710225962, now seen corresponding path program 14 times [2022-01-18 15:45:39,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:39,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426122953] [2022-01-18 15:45:39,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:39,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:39,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:40,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:40,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:40,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426122953] [2022-01-18 15:45:40,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426122953] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:40,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701864521] [2022-01-18 15:45:40,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:45:40,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:40,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:40,020 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:40,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-01-18 15:45:40,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:45:40,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:40,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:45:40,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:40,181 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:40,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:45:40,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:40,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:40,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:40,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:45:40,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:40,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:45:40,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:40,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701864521] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:40,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:40,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:45:40,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705331957] [2022-01-18 15:45:40,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:40,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:45:40,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:40,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:45:40,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:45:40,758 INFO L87 Difference]: Start difference. First operand 3464 states and 14598 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:41,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:41,648 INFO L93 Difference]: Finished difference Result 4262 states and 17672 transitions. [2022-01-18 15:45:41,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:45:41,648 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:45:41,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:41,657 INFO L225 Difference]: With dead ends: 4262 [2022-01-18 15:45:41,657 INFO L226 Difference]: Without dead ends: 4216 [2022-01-18 15:45:41,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:45:41,658 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 253 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:41,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 540 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1174 Invalid, 0 Unknown, 89 Unchecked, 0.5s Time] [2022-01-18 15:45:41,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4216 states. [2022-01-18 15:45:41,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4216 to 3470. [2022-01-18 15:45:41,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3470 states, 3469 states have (on average 4.216200634188527) internal successors, (14626), 3469 states have internal predecessors, (14626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:41,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3470 states to 3470 states and 14626 transitions. [2022-01-18 15:45:41,712 INFO L78 Accepts]: Start accepts. Automaton has 3470 states and 14626 transitions. Word has length 23 [2022-01-18 15:45:41,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:41,712 INFO L470 AbstractCegarLoop]: Abstraction has 3470 states and 14626 transitions. [2022-01-18 15:45:41,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:41,712 INFO L276 IsEmpty]: Start isEmpty. Operand 3470 states and 14626 transitions. [2022-01-18 15:45:41,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:45:41,718 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:41,718 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:41,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-01-18 15:45:41,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-01-18 15:45:41,918 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:45:41,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:41,919 INFO L85 PathProgramCache]: Analyzing trace with hash -865529710, now seen corresponding path program 15 times [2022-01-18 15:45:41,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:41,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813850168] [2022-01-18 15:45:41,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:41,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:41,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:42,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:42,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:42,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813850168] [2022-01-18 15:45:42,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813850168] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:42,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983740902] [2022-01-18 15:45:42,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:45:42,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:42,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:42,064 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:42,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-01-18 15:45:42,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:45:42,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:42,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 15:45:42,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:42,300 INFO L353 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2022-01-18 15:45:42,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 72 [2022-01-18 15:45:42,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:42,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:42,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:42,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983740902] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:42,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:42,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-01-18 15:45:42,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674671372] [2022-01-18 15:45:42,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:42,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:45:42,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:42,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:45:42,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:45:42,632 INFO L87 Difference]: Start difference. First operand 3470 states and 14626 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:44,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:44,923 INFO L93 Difference]: Finished difference Result 5170 states and 21382 transitions. [2022-01-18 15:45:44,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 15:45:44,923 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:45:44,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:44,935 INFO L225 Difference]: With dead ends: 5170 [2022-01-18 15:45:44,935 INFO L226 Difference]: Without dead ends: 5115 [2022-01-18 15:45:44,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=516, Invalid=3774, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 15:45:44,936 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 478 mSDsluCounter, 1448 mSDsCounter, 0 mSdLazyCounter, 2343 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 2513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 2343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:44,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 867 Invalid, 2513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 2343 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 15:45:44,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5115 states. [2022-01-18 15:45:44,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5115 to 3518. [2022-01-18 15:45:44,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3518 states, 3517 states have (on average 4.223485925504692) internal successors, (14854), 3517 states have internal predecessors, (14854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:44,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3518 states to 3518 states and 14854 transitions. [2022-01-18 15:45:44,995 INFO L78 Accepts]: Start accepts. Automaton has 3518 states and 14854 transitions. Word has length 23 [2022-01-18 15:45:44,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:44,995 INFO L470 AbstractCegarLoop]: Abstraction has 3518 states and 14854 transitions. [2022-01-18 15:45:44,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:44,996 INFO L276 IsEmpty]: Start isEmpty. Operand 3518 states and 14854 transitions. [2022-01-18 15:45:45,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:45:45,001 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:45,001 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:45,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-01-18 15:45:45,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:45,202 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:45:45,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:45,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1030738572, now seen corresponding path program 16 times [2022-01-18 15:45:45,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:45,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747592914] [2022-01-18 15:45:45,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:45,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:45,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:45,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:45,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747592914] [2022-01-18 15:45:45,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747592914] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:45,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086086971] [2022-01-18 15:45:45,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:45:45,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:45,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:45,378 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:45,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-01-18 15:45:45,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:45:45,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:45,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:45:45,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:45,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:45,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:45:45,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:45,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:46,121 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:46,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:45:46,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:46,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:45:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:46,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086086971] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:46,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:46,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:45:46,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944182908] [2022-01-18 15:45:46,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:46,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:45:46,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:46,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:45:46,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:45:46,183 INFO L87 Difference]: Start difference. First operand 3518 states and 14854 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:47,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:47,244 INFO L93 Difference]: Finished difference Result 4354 states and 18116 transitions. [2022-01-18 15:45:47,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 15:45:47,244 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:45:47,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:47,254 INFO L225 Difference]: With dead ends: 4354 [2022-01-18 15:45:47,254 INFO L226 Difference]: Without dead ends: 4323 [2022-01-18 15:45:47,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=278, Invalid=1528, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 15:45:47,254 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 234 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 1652 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 1886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:47,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 640 Invalid, 1886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1652 Invalid, 0 Unknown, 162 Unchecked, 0.7s Time] [2022-01-18 15:45:47,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4323 states. [2022-01-18 15:45:47,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4323 to 3543. [2022-01-18 15:45:47,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3543 states, 3542 states have (on average 4.230378317334839) internal successors, (14984), 3542 states have internal predecessors, (14984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:47,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3543 states to 3543 states and 14984 transitions. [2022-01-18 15:45:47,314 INFO L78 Accepts]: Start accepts. Automaton has 3543 states and 14984 transitions. Word has length 23 [2022-01-18 15:45:47,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:47,314 INFO L470 AbstractCegarLoop]: Abstraction has 3543 states and 14984 transitions. [2022-01-18 15:45:47,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:47,314 INFO L276 IsEmpty]: Start isEmpty. Operand 3543 states and 14984 transitions. [2022-01-18 15:45:47,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:45:47,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:47,320 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:47,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:47,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:47,521 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:45:47,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:47,521 INFO L85 PathProgramCache]: Analyzing trace with hash -442993250, now seen corresponding path program 17 times [2022-01-18 15:45:47,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:47,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235730162] [2022-01-18 15:45:47,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:47,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:47,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:47,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:47,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:47,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235730162] [2022-01-18 15:45:47,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235730162] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:47,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033565722] [2022-01-18 15:45:47,715 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:45:47,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:47,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:47,717 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:47,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-01-18 15:45:47,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:45:47,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:47,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:45:47,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:47,923 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:47,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:45:48,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:48,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:48,422 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:48,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:45:48,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:48,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:45:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:48,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033565722] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:48,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:48,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:45:48,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314162027] [2022-01-18 15:45:48,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:48,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:45:48,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:48,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:45:48,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:45:48,476 INFO L87 Difference]: Start difference. First operand 3543 states and 14984 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:49,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:49,453 INFO L93 Difference]: Finished difference Result 4088 states and 17088 transitions. [2022-01-18 15:45:49,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:45:49,454 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:45:49,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:49,463 INFO L225 Difference]: With dead ends: 4088 [2022-01-18 15:45:49,463 INFO L226 Difference]: Without dead ends: 4060 [2022-01-18 15:45:49,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=272, Invalid=1288, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:45:49,464 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 234 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:49,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 511 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1319 Invalid, 0 Unknown, 125 Unchecked, 0.5s Time] [2022-01-18 15:45:49,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4060 states. [2022-01-18 15:45:49,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4060 to 3549. [2022-01-18 15:45:49,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3549 states, 3548 states have (on average 4.229988726042841) internal successors, (15008), 3548 states have internal predecessors, (15008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:49,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3549 states to 3549 states and 15008 transitions. [2022-01-18 15:45:49,540 INFO L78 Accepts]: Start accepts. Automaton has 3549 states and 15008 transitions. Word has length 23 [2022-01-18 15:45:49,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:49,540 INFO L470 AbstractCegarLoop]: Abstraction has 3549 states and 15008 transitions. [2022-01-18 15:45:49,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:49,540 INFO L276 IsEmpty]: Start isEmpty. Operand 3549 states and 15008 transitions. [2022-01-18 15:45:49,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:45:49,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:49,545 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:49,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-01-18 15:45:49,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-01-18 15:45:49,747 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:45:49,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:49,748 INFO L85 PathProgramCache]: Analyzing trace with hash 632717906, now seen corresponding path program 18 times [2022-01-18 15:45:49,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:49,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188541548] [2022-01-18 15:45:49,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:49,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:49,896 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:49,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:49,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188541548] [2022-01-18 15:45:49,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188541548] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:49,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341224397] [2022-01-18 15:45:49,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:45:49,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:49,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:49,898 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:49,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-01-18 15:45:49,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:45:49,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:49,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:45:49,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:50,061 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:50,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:45:50,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:50,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:50,593 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:50,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:45:50,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:50,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:45:50,642 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:50,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341224397] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:50,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:50,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:45:50,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809319876] [2022-01-18 15:45:50,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:50,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:45:50,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:50,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:45:50,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:45:50,643 INFO L87 Difference]: Start difference. First operand 3549 states and 15008 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:51,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:51,550 INFO L93 Difference]: Finished difference Result 4175 states and 17437 transitions. [2022-01-18 15:45:51,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:45:51,550 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:45:51,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:51,561 INFO L225 Difference]: With dead ends: 4175 [2022-01-18 15:45:51,561 INFO L226 Difference]: Without dead ends: 4152 [2022-01-18 15:45:51,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=249, Invalid=1157, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:45:51,562 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 234 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:51,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 506 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1295 Invalid, 0 Unknown, 94 Unchecked, 0.5s Time] [2022-01-18 15:45:51,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4152 states. [2022-01-18 15:45:51,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4152 to 3541. [2022-01-18 15:45:51,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3541 states, 3540 states have (on average 4.231073446327684) internal successors, (14978), 3540 states have internal predecessors, (14978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:51,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3541 states to 3541 states and 14978 transitions. [2022-01-18 15:45:51,647 INFO L78 Accepts]: Start accepts. Automaton has 3541 states and 14978 transitions. Word has length 23 [2022-01-18 15:45:51,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:51,647 INFO L470 AbstractCegarLoop]: Abstraction has 3541 states and 14978 transitions. [2022-01-18 15:45:51,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:51,647 INFO L276 IsEmpty]: Start isEmpty. Operand 3541 states and 14978 transitions. [2022-01-18 15:45:51,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:45:51,652 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:51,652 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:51,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-01-18 15:45:51,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:51,853 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:45:51,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:51,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1039608366, now seen corresponding path program 19 times [2022-01-18 15:45:51,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:51,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532557853] [2022-01-18 15:45:51,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:51,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:51,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:52,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:52,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:52,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532557853] [2022-01-18 15:45:52,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532557853] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:52,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360634144] [2022-01-18 15:45:52,030 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:45:52,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:52,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:52,031 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:52,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-01-18 15:45:52,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:52,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:45:52,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:52,256 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:52,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:45:53,118 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:53,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:53,288 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:53,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:45:53,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:53,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:45:53,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:53,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360634144] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:53,342 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:53,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:45:53,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165918783] [2022-01-18 15:45:53,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:53,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:45:53,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:53,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:45:53,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:45:53,342 INFO L87 Difference]: Start difference. First operand 3541 states and 14978 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:53,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:53,928 INFO L93 Difference]: Finished difference Result 3994 states and 16730 transitions. [2022-01-18 15:45:53,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:45:53,929 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:45:53,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:53,938 INFO L225 Difference]: With dead ends: 3994 [2022-01-18 15:45:53,938 INFO L226 Difference]: Without dead ends: 3960 [2022-01-18 15:45:53,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:45:53,938 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 133 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:53,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 392 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 940 Invalid, 0 Unknown, 183 Unchecked, 0.4s Time] [2022-01-18 15:45:53,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3960 states. [2022-01-18 15:45:53,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3960 to 3562. [2022-01-18 15:45:53,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3562 states, 3561 states have (on average 4.229429935411401) internal successors, (15061), 3561 states have internal predecessors, (15061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:53,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3562 states to 3562 states and 15061 transitions. [2022-01-18 15:45:53,993 INFO L78 Accepts]: Start accepts. Automaton has 3562 states and 15061 transitions. Word has length 23 [2022-01-18 15:45:53,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:53,993 INFO L470 AbstractCegarLoop]: Abstraction has 3562 states and 15061 transitions. [2022-01-18 15:45:53,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:53,994 INFO L276 IsEmpty]: Start isEmpty. Operand 3562 states and 15061 transitions. [2022-01-18 15:45:53,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:45:53,999 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:53,999 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:54,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-01-18 15:45:54,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:54,200 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:45:54,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:54,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1926661510, now seen corresponding path program 20 times [2022-01-18 15:45:54,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:54,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607903869] [2022-01-18 15:45:54,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:54,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:54,357 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:54,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:54,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607903869] [2022-01-18 15:45:54,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607903869] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:54,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291155521] [2022-01-18 15:45:54,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:45:54,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:54,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:54,358 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:54,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-01-18 15:45:54,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:45:54,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:54,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:45:54,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:54,605 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:54,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2022-01-18 15:45:54,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:54,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:55,090 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:55,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:45:55,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:55,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:45:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:55,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291155521] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:55,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:55,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:45:55,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744584547] [2022-01-18 15:45:55,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:55,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:45:55,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:55,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:45:55,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:45:55,143 INFO L87 Difference]: Start difference. First operand 3562 states and 15061 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:56,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:56,195 INFO L93 Difference]: Finished difference Result 4271 states and 17817 transitions. [2022-01-18 15:45:56,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 15:45:56,195 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:45:56,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:56,205 INFO L225 Difference]: With dead ends: 4271 [2022-01-18 15:45:56,205 INFO L226 Difference]: Without dead ends: 4240 [2022-01-18 15:45:56,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=274, Invalid=1618, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 15:45:56,206 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 214 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 1616 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 1919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 228 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:56,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 618 Invalid, 1919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1616 Invalid, 0 Unknown, 228 Unchecked, 0.6s Time] [2022-01-18 15:45:56,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4240 states. [2022-01-18 15:45:56,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4240 to 3568. [2022-01-18 15:45:56,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3568 states, 3567 states have (on average 4.230165405102327) internal successors, (15089), 3567 states have internal predecessors, (15089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:56,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3568 states to 3568 states and 15089 transitions. [2022-01-18 15:45:56,267 INFO L78 Accepts]: Start accepts. Automaton has 3568 states and 15089 transitions. Word has length 23 [2022-01-18 15:45:56,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:56,267 INFO L470 AbstractCegarLoop]: Abstraction has 3568 states and 15089 transitions. [2022-01-18 15:45:56,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:56,267 INFO L276 IsEmpty]: Start isEmpty. Operand 3568 states and 15089 transitions. [2022-01-18 15:45:56,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:45:56,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:56,273 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:56,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-01-18 15:45:56,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-01-18 15:45:56,474 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:45:56,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:56,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1780560464, now seen corresponding path program 21 times [2022-01-18 15:45:56,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:56,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027027141] [2022-01-18 15:45:56,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:56,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:56,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:56,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:56,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027027141] [2022-01-18 15:45:56,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027027141] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:56,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627425376] [2022-01-18 15:45:56,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:45:56,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:56,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:56,626 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:56,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-01-18 15:45:56,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:45:56,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:56,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:45:56,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:56,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:56,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:45:57,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:57,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:57,362 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:57,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:45:57,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:57,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:45:57,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:57,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627425376] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:57,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:57,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:45:57,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206403618] [2022-01-18 15:45:57,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:57,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:45:57,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:57,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:45:57,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:45:57,413 INFO L87 Difference]: Start difference. First operand 3568 states and 15089 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:58,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:45:58,501 INFO L93 Difference]: Finished difference Result 4101 states and 17150 transitions. [2022-01-18 15:45:58,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 15:45:58,501 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:45:58,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:45:58,510 INFO L225 Difference]: With dead ends: 4101 [2022-01-18 15:45:58,510 INFO L226 Difference]: Without dead ends: 4073 [2022-01-18 15:45:58,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=311, Invalid=1669, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 15:45:58,510 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 189 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 1369 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:45:58,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 571 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1369 Invalid, 0 Unknown, 250 Unchecked, 0.6s Time] [2022-01-18 15:45:58,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4073 states. [2022-01-18 15:45:58,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4073 to 3574. [2022-01-18 15:45:58,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3574 states, 3573 states have (on average 4.229778897285194) internal successors, (15113), 3573 states have internal predecessors, (15113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:58,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3574 states to 3574 states and 15113 transitions. [2022-01-18 15:45:58,564 INFO L78 Accepts]: Start accepts. Automaton has 3574 states and 15113 transitions. Word has length 23 [2022-01-18 15:45:58,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:45:58,564 INFO L470 AbstractCegarLoop]: Abstraction has 3574 states and 15113 transitions. [2022-01-18 15:45:58,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:45:58,564 INFO L276 IsEmpty]: Start isEmpty. Operand 3574 states and 15113 transitions. [2022-01-18 15:45:58,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:45:58,570 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:45:58,570 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:45:58,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-01-18 15:45:58,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-01-18 15:45:58,770 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:45:58,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:45:58,770 INFO L85 PathProgramCache]: Analyzing trace with hash -704849308, now seen corresponding path program 22 times [2022-01-18 15:45:58,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:45:58,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113243321] [2022-01-18 15:45:58,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:45:58,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:45:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:45:58,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:58,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:45:58,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113243321] [2022-01-18 15:45:58,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113243321] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:45:58,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028651226] [2022-01-18 15:45:58,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:45:58,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:45:58,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:45:58,944 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:45:58,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-01-18 15:45:58,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:45:58,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:45:58,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:45:58,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:45:59,129 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:59,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:45:59,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:59,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:45:59,720 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:45:59,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:45:59,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:45:59,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:45:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:45:59,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028651226] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:45:59,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:45:59,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:45:59,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033439344] [2022-01-18 15:45:59,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:45:59,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:45:59,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:45:59,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:45:59,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:45:59,769 INFO L87 Difference]: Start difference. First operand 3574 states and 15113 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:00,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:00,718 INFO L93 Difference]: Finished difference Result 4136 states and 17284 transitions. [2022-01-18 15:46:00,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:46:00,719 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:46:00,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:00,727 INFO L225 Difference]: With dead ends: 4136 [2022-01-18 15:46:00,728 INFO L226 Difference]: Without dead ends: 4113 [2022-01-18 15:46:00,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=254, Invalid=1306, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:46:00,728 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 195 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:00,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 554 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1336 Invalid, 0 Unknown, 59 Unchecked, 0.5s Time] [2022-01-18 15:46:00,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4113 states. [2022-01-18 15:46:00,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4113 to 3562. [2022-01-18 15:46:00,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3562 states, 3561 states have (on average 4.229429935411401) internal successors, (15061), 3561 states have internal predecessors, (15061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:00,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3562 states to 3562 states and 15061 transitions. [2022-01-18 15:46:00,784 INFO L78 Accepts]: Start accepts. Automaton has 3562 states and 15061 transitions. Word has length 23 [2022-01-18 15:46:00,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:00,784 INFO L470 AbstractCegarLoop]: Abstraction has 3562 states and 15061 transitions. [2022-01-18 15:46:00,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:00,784 INFO L276 IsEmpty]: Start isEmpty. Operand 3562 states and 15061 transitions. [2022-01-18 15:46:00,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:46:00,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:00,790 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:00,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-01-18 15:46:00,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-01-18 15:46:00,990 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:46:00,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:00,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1991295016, now seen corresponding path program 23 times [2022-01-18 15:46:00,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:00,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177783877] [2022-01-18 15:46:00,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:00,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:01,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:01,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:01,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177783877] [2022-01-18 15:46:01,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177783877] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:01,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552543687] [2022-01-18 15:46:01,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:46:01,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:01,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:01,146 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:01,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-01-18 15:46:01,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:46:01,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:01,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:46:01,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:01,326 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:01,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:46:01,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:01,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:01,764 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:01,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:46:01,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:01,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:46:01,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:01,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552543687] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:01,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:01,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:46:01,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969974031] [2022-01-18 15:46:01,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:01,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:46:01,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:01,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:46:01,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:46:01,818 INFO L87 Difference]: Start difference. First operand 3562 states and 15061 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:02,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:02,776 INFO L93 Difference]: Finished difference Result 4298 states and 17892 transitions. [2022-01-18 15:46:02,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:46:02,776 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:46:02,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:02,785 INFO L225 Difference]: With dead ends: 4298 [2022-01-18 15:46:02,786 INFO L226 Difference]: Without dead ends: 4267 [2022-01-18 15:46:02,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:46:02,786 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 208 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 1610 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 1844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:02,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 641 Invalid, 1844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1610 Invalid, 0 Unknown, 185 Unchecked, 0.6s Time] [2022-01-18 15:46:02,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4267 states. [2022-01-18 15:46:02,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4267 to 3562. [2022-01-18 15:46:02,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3562 states, 3561 states have (on average 4.229429935411401) internal successors, (15061), 3561 states have internal predecessors, (15061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:02,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3562 states to 3562 states and 15061 transitions. [2022-01-18 15:46:02,843 INFO L78 Accepts]: Start accepts. Automaton has 3562 states and 15061 transitions. Word has length 23 [2022-01-18 15:46:02,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:02,843 INFO L470 AbstractCegarLoop]: Abstraction has 3562 states and 15061 transitions. [2022-01-18 15:46:02,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:02,843 INFO L276 IsEmpty]: Start isEmpty. Operand 3562 states and 15061 transitions. [2022-01-18 15:46:02,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:46:02,849 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:02,849 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:02,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:03,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:03,049 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:46:03,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:03,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1715926958, now seen corresponding path program 24 times [2022-01-18 15:46:03,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:03,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64049844] [2022-01-18 15:46:03,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:03,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:03,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:03,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64049844] [2022-01-18 15:46:03,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64049844] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:03,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927943408] [2022-01-18 15:46:03,222 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:46:03,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:03,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:03,223 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:03,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-01-18 15:46:03,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:46:03,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:03,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:46:03,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:03,382 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:03,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:46:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:03,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:03,868 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:03,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:46:03,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:03,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:46:03,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:03,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927943408] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:03,932 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:03,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:46:03,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880477536] [2022-01-18 15:46:03,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:03,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:46:03,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:03,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:46:03,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:46:03,933 INFO L87 Difference]: Start difference. First operand 3562 states and 15061 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:05,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:05,011 INFO L93 Difference]: Finished difference Result 4173 states and 17418 transitions. [2022-01-18 15:46:05,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 15:46:05,011 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:46:05,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:05,019 INFO L225 Difference]: With dead ends: 4173 [2022-01-18 15:46:05,019 INFO L226 Difference]: Without dead ends: 4145 [2022-01-18 15:46:05,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 15:46:05,020 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 265 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 1557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 267 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:05,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 483 Invalid, 1557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1206 Invalid, 0 Unknown, 267 Unchecked, 0.5s Time] [2022-01-18 15:46:05,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4145 states. [2022-01-18 15:46:05,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4145 to 3550. [2022-01-18 15:46:05,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3550 states, 3549 states have (on average 4.227106227106227) internal successors, (15002), 3549 states have internal predecessors, (15002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:05,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3550 states to 3550 states and 15002 transitions. [2022-01-18 15:46:05,070 INFO L78 Accepts]: Start accepts. Automaton has 3550 states and 15002 transitions. Word has length 23 [2022-01-18 15:46:05,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:05,070 INFO L470 AbstractCegarLoop]: Abstraction has 3550 states and 15002 transitions. [2022-01-18 15:46:05,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:05,071 INFO L276 IsEmpty]: Start isEmpty. Operand 3550 states and 15002 transitions. [2022-01-18 15:46:05,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:46:05,076 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:05,076 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:05,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:05,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-01-18 15:46:05,277 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:46:05,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:05,277 INFO L85 PathProgramCache]: Analyzing trace with hash 44075248, now seen corresponding path program 25 times [2022-01-18 15:46:05,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:05,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274535633] [2022-01-18 15:46:05,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:05,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:05,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:05,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:05,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:05,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274535633] [2022-01-18 15:46:05,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274535633] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:05,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254276000] [2022-01-18 15:46:05,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:46:05,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:05,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:05,430 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:05,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-01-18 15:46:05,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:05,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:46:05,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:05,621 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:05,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:46:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:05,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:06,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:06,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:46:06,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:06,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:46:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:06,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254276000] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:06,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:06,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:46:06,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102021171] [2022-01-18 15:46:06,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:06,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:46:06,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:06,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:46:06,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:46:06,116 INFO L87 Difference]: Start difference. First operand 3550 states and 15002 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:07,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:07,172 INFO L93 Difference]: Finished difference Result 4136 states and 17305 transitions. [2022-01-18 15:46:07,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 15:46:07,173 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:46:07,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:07,182 INFO L225 Difference]: With dead ends: 4136 [2022-01-18 15:46:07,182 INFO L226 Difference]: Without dead ends: 4112 [2022-01-18 15:46:07,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=233, Invalid=1406, Unknown=1, NotChecked=0, Total=1640 [2022-01-18 15:46:07,182 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 220 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 1403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:07,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 486 Invalid, 1403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1201 Invalid, 0 Unknown, 138 Unchecked, 0.5s Time] [2022-01-18 15:46:07,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4112 states. [2022-01-18 15:46:07,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4112 to 3550. [2022-01-18 15:46:07,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3550 states, 3549 states have (on average 4.227106227106227) internal successors, (15002), 3549 states have internal predecessors, (15002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:07,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3550 states to 3550 states and 15002 transitions. [2022-01-18 15:46:07,269 INFO L78 Accepts]: Start accepts. Automaton has 3550 states and 15002 transitions. Word has length 23 [2022-01-18 15:46:07,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:07,269 INFO L470 AbstractCegarLoop]: Abstraction has 3550 states and 15002 transitions. [2022-01-18 15:46:07,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:07,269 INFO L276 IsEmpty]: Start isEmpty. Operand 3550 states and 15002 transitions. [2022-01-18 15:46:07,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:46:07,275 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:07,275 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:07,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:07,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-01-18 15:46:07,475 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:46:07,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:07,476 INFO L85 PathProgramCache]: Analyzing trace with hash -862085712, now seen corresponding path program 26 times [2022-01-18 15:46:07,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:07,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374047241] [2022-01-18 15:46:07,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:07,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:07,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:07,621 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:07,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:07,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374047241] [2022-01-18 15:46:07,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374047241] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:07,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478850355] [2022-01-18 15:46:07,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:46:07,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:07,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:07,622 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:07,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-01-18 15:46:07,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:46:07,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:07,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:46:07,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:07,793 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:07,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:46:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:08,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:08,297 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:08,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:46:08,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:08,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:46:08,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:08,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478850355] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:08,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:08,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:46:08,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720692949] [2022-01-18 15:46:08,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:08,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:46:08,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:08,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:46:08,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:46:08,349 INFO L87 Difference]: Start difference. First operand 3550 states and 15002 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:09,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:09,335 INFO L93 Difference]: Finished difference Result 4052 states and 16939 transitions. [2022-01-18 15:46:09,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:46:09,336 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:46:09,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:09,344 INFO L225 Difference]: With dead ends: 4052 [2022-01-18 15:46:09,344 INFO L226 Difference]: Without dead ends: 4024 [2022-01-18 15:46:09,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=300, Invalid=1592, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 15:46:09,345 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 196 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:09,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 451 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1089 Invalid, 0 Unknown, 170 Unchecked, 0.4s Time] [2022-01-18 15:46:09,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4024 states. [2022-01-18 15:46:09,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4024 to 3544. [2022-01-18 15:46:09,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3544 states, 3543 states have (on average 4.227490826982783) internal successors, (14978), 3543 states have internal predecessors, (14978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:09,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3544 states to 3544 states and 14978 transitions. [2022-01-18 15:46:09,397 INFO L78 Accepts]: Start accepts. Automaton has 3544 states and 14978 transitions. Word has length 23 [2022-01-18 15:46:09,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:09,397 INFO L470 AbstractCegarLoop]: Abstraction has 3544 states and 14978 transitions. [2022-01-18 15:46:09,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:09,398 INFO L276 IsEmpty]: Start isEmpty. Operand 3544 states and 14978 transitions. [2022-01-18 15:46:09,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:46:09,403 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:09,403 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:09,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-01-18 15:46:09,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:09,604 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:46:09,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:09,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1284622172, now seen corresponding path program 27 times [2022-01-18 15:46:09,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:09,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004179491] [2022-01-18 15:46:09,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:09,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:09,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:09,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004179491] [2022-01-18 15:46:09,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004179491] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:09,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029068536] [2022-01-18 15:46:09,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:46:09,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:09,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:09,792 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:09,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-01-18 15:46:09,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:46:09,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:09,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 15:46:09,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:10,053 INFO L353 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2022-01-18 15:46:10,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 51 [2022-01-18 15:46:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:10,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:10,356 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:10,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029068536] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:10,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:10,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2022-01-18 15:46:10,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823745784] [2022-01-18 15:46:10,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:10,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:46:10,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:10,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:46:10,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:46:10,357 INFO L87 Difference]: Start difference. First operand 3544 states and 14978 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:12,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:12,814 INFO L93 Difference]: Finished difference Result 5248 states and 21687 transitions. [2022-01-18 15:46:12,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 15:46:12,815 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:46:12,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:12,826 INFO L225 Difference]: With dead ends: 5248 [2022-01-18 15:46:12,827 INFO L226 Difference]: Without dead ends: 5198 [2022-01-18 15:46:12,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1271 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=558, Invalid=4272, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 15:46:12,827 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 521 mSDsluCounter, 1773 mSDsCounter, 0 mSdLazyCounter, 3027 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 1062 SdHoareTripleChecker+Invalid, 3241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 3027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:12,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 1062 Invalid, 3241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 3027 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 15:46:12,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5198 states. [2022-01-18 15:46:12,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5198 to 3600. [2022-01-18 15:46:12,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3600 states, 3599 states have (on average 4.233398166157266) internal successors, (15236), 3599 states have internal predecessors, (15236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:12,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3600 states to 3600 states and 15236 transitions. [2022-01-18 15:46:12,909 INFO L78 Accepts]: Start accepts. Automaton has 3600 states and 15236 transitions. Word has length 23 [2022-01-18 15:46:12,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:12,909 INFO L470 AbstractCegarLoop]: Abstraction has 3600 states and 15236 transitions. [2022-01-18 15:46:12,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:12,909 INFO L276 IsEmpty]: Start isEmpty. Operand 3600 states and 15236 transitions. [2022-01-18 15:46:12,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:46:12,914 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:12,915 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:12,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-01-18 15:46:13,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:13,116 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:46:13,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:13,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1577602254, now seen corresponding path program 16 times [2022-01-18 15:46:13,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:13,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235567243] [2022-01-18 15:46:13,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:13,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:13,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:13,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:13,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235567243] [2022-01-18 15:46:13,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235567243] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:13,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836775885] [2022-01-18 15:46:13,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:46:13,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:13,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:13,264 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:13,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-01-18 15:46:13,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:46:13,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:13,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:46:13,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:13,496 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:13,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2022-01-18 15:46:13,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:13,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:13,984 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:13,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:46:13,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:13,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:46:14,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:14,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836775885] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:14,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:14,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:46:14,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660832108] [2022-01-18 15:46:14,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:14,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:46:14,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:14,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:46:14,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:46:14,045 INFO L87 Difference]: Start difference. First operand 3600 states and 15236 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:14,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:14,671 INFO L93 Difference]: Finished difference Result 3842 states and 16159 transitions. [2022-01-18 15:46:14,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:46:14,671 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:46:14,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:14,680 INFO L225 Difference]: With dead ends: 3842 [2022-01-18 15:46:14,680 INFO L226 Difference]: Without dead ends: 3827 [2022-01-18 15:46:14,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:46:14,680 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 149 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:14,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 488 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1021 Invalid, 0 Unknown, 148 Unchecked, 0.4s Time] [2022-01-18 15:46:14,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3827 states. [2022-01-18 15:46:14,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3827 to 3600. [2022-01-18 15:46:14,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3600 states, 3599 states have (on average 4.233398166157266) internal successors, (15236), 3599 states have internal predecessors, (15236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:14,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3600 states to 3600 states and 15236 transitions. [2022-01-18 15:46:14,733 INFO L78 Accepts]: Start accepts. Automaton has 3600 states and 15236 transitions. Word has length 23 [2022-01-18 15:46:14,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:14,733 INFO L470 AbstractCegarLoop]: Abstraction has 3600 states and 15236 transitions. [2022-01-18 15:46:14,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:14,733 INFO L276 IsEmpty]: Start isEmpty. Operand 3600 states and 15236 transitions. [2022-01-18 15:46:14,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:46:14,739 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:14,739 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:14,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:14,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2022-01-18 15:46:14,940 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:46:14,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:14,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1127056206, now seen corresponding path program 17 times [2022-01-18 15:46:14,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:14,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001683729] [2022-01-18 15:46:14,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:14,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:14,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:15,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:15,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:15,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001683729] [2022-01-18 15:46:15,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001683729] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:15,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841273282] [2022-01-18 15:46:15,158 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:46:15,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:15,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:15,160 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:15,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-01-18 15:46:15,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:46:15,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:15,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:46:15,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:15,393 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:15,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:46:15,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:15,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:15,905 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:15,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:46:15,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:15,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:46:15,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:15,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841273282] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:15,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:15,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:46:15,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689800122] [2022-01-18 15:46:15,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:15,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:46:15,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:15,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:46:15,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:46:15,960 INFO L87 Difference]: Start difference. First operand 3600 states and 15236 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:16,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:16,821 INFO L93 Difference]: Finished difference Result 3853 states and 16197 transitions. [2022-01-18 15:46:16,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:46:16,821 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:46:16,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:16,830 INFO L225 Difference]: With dead ends: 3853 [2022-01-18 15:46:16,830 INFO L226 Difference]: Without dead ends: 3831 [2022-01-18 15:46:16,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=234, Invalid=1326, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:46:16,830 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 204 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:16,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 388 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 928 Invalid, 0 Unknown, 134 Unchecked, 0.4s Time] [2022-01-18 15:46:16,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3831 states. [2022-01-18 15:46:16,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3831 to 3604. [2022-01-18 15:46:16,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3604 states, 3603 states have (on average 4.233694143769081) internal successors, (15254), 3603 states have internal predecessors, (15254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:16,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3604 states to 3604 states and 15254 transitions. [2022-01-18 15:46:16,882 INFO L78 Accepts]: Start accepts. Automaton has 3604 states and 15254 transitions. Word has length 23 [2022-01-18 15:46:16,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:16,882 INFO L470 AbstractCegarLoop]: Abstraction has 3604 states and 15254 transitions. [2022-01-18 15:46:16,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:16,883 INFO L276 IsEmpty]: Start isEmpty. Operand 3604 states and 15254 transitions. [2022-01-18 15:46:16,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:46:16,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:16,888 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:16,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-01-18 15:46:17,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:17,089 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:46:17,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:17,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1557952640, now seen corresponding path program 18 times [2022-01-18 15:46:17,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:17,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661948098] [2022-01-18 15:46:17,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:17,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:17,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:17,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:17,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:17,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661948098] [2022-01-18 15:46:17,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661948098] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:17,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532619288] [2022-01-18 15:46:17,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:46:17,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:17,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:17,244 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:17,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-01-18 15:46:17,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:46:17,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:17,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-18 15:46:17,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:17,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:17,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:17,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:17,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 12 [2022-01-18 15:46:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:17,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:17,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:46:17,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2022-01-18 15:46:17,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:17,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532619288] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:17,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:17,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:46:17,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488689310] [2022-01-18 15:46:17,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:17,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:46:17,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:17,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:46:17,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:46:17,841 INFO L87 Difference]: Start difference. First operand 3604 states and 15254 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:19,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:19,215 INFO L93 Difference]: Finished difference Result 6285 states and 26013 transitions. [2022-01-18 15:46:19,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 15:46:19,215 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:46:19,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:19,230 INFO L225 Difference]: With dead ends: 6285 [2022-01-18 15:46:19,230 INFO L226 Difference]: Without dead ends: 6247 [2022-01-18 15:46:19,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=486, Invalid=1866, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 15:46:19,230 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 392 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 1602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:19,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 572 Invalid, 1602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 1201 Invalid, 0 Unknown, 135 Unchecked, 0.6s Time] [2022-01-18 15:46:19,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6247 states. [2022-01-18 15:46:19,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6247 to 3784. [2022-01-18 15:46:19,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3784 states, 3783 states have (on average 4.257731958762887) internal successors, (16107), 3783 states have internal predecessors, (16107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:19,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 16107 transitions. [2022-01-18 15:46:19,304 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 16107 transitions. Word has length 23 [2022-01-18 15:46:19,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:19,304 INFO L470 AbstractCegarLoop]: Abstraction has 3784 states and 16107 transitions. [2022-01-18 15:46:19,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:19,304 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 16107 transitions. [2022-01-18 15:46:19,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:46:19,310 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:19,310 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:19,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-01-18 15:46:19,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-01-18 15:46:19,510 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:46:19,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:19,511 INFO L85 PathProgramCache]: Analyzing trace with hash -894016338, now seen corresponding path program 19 times [2022-01-18 15:46:19,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:19,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350096802] [2022-01-18 15:46:19,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:19,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:19,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:19,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:19,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:19,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350096802] [2022-01-18 15:46:19,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350096802] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:19,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178428844] [2022-01-18 15:46:19,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:46:19,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:19,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:19,696 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:19,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-01-18 15:46:19,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:19,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:46:19,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:19,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:19,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 40 [2022-01-18 15:46:20,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:20,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:20,391 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:20,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:46:20,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:20,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:46:20,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:20,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178428844] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:20,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:20,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:46:20,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130773746] [2022-01-18 15:46:20,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:20,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:46:20,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:20,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:46:20,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:46:20,443 INFO L87 Difference]: Start difference. First operand 3784 states and 16107 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:21,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:21,007 INFO L93 Difference]: Finished difference Result 4018 states and 17002 transitions. [2022-01-18 15:46:21,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:46:21,007 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:46:21,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:21,016 INFO L225 Difference]: With dead ends: 4018 [2022-01-18 15:46:21,016 INFO L226 Difference]: Without dead ends: 4003 [2022-01-18 15:46:21,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=914, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:46:21,017 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 146 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:21,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 449 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 941 Invalid, 0 Unknown, 74 Unchecked, 0.4s Time] [2022-01-18 15:46:21,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4003 states. [2022-01-18 15:46:21,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4003 to 3788. [2022-01-18 15:46:21,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 3787 states have (on average 4.257987853181938) internal successors, (16125), 3787 states have internal predecessors, (16125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:21,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 16125 transitions. [2022-01-18 15:46:21,073 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 16125 transitions. Word has length 23 [2022-01-18 15:46:21,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:21,073 INFO L470 AbstractCegarLoop]: Abstraction has 3788 states and 16125 transitions. [2022-01-18 15:46:21,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:21,073 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 16125 transitions. [2022-01-18 15:46:21,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:46:21,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:21,079 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:21,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-01-18 15:46:21,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-01-18 15:46:21,280 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:46:21,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:21,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1315950606, now seen corresponding path program 20 times [2022-01-18 15:46:21,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:21,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633311155] [2022-01-18 15:46:21,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:21,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:21,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:21,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:21,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633311155] [2022-01-18 15:46:21,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633311155] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:21,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104091496] [2022-01-18 15:46:21,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:46:21,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:21,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:21,437 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:21,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-01-18 15:46:21,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:46:21,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:21,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:46:21,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:21,624 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:21,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 51 [2022-01-18 15:46:21,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:21,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:21,852 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:21,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:46:21,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:21,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:46:21,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:21,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104091496] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:21,901 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:21,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:46:21,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468217875] [2022-01-18 15:46:21,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:21,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:46:21,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:21,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:46:21,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:46:21,902 INFO L87 Difference]: Start difference. First operand 3788 states and 16125 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:22,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:22,505 INFO L93 Difference]: Finished difference Result 4029 states and 17038 transitions. [2022-01-18 15:46:22,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:46:22,505 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:46:22,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:22,514 INFO L225 Difference]: With dead ends: 4029 [2022-01-18 15:46:22,514 INFO L226 Difference]: Without dead ends: 4014 [2022-01-18 15:46:22,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:46:22,514 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 132 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:22,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 536 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1060 Invalid, 0 Unknown, 49 Unchecked, 0.4s Time] [2022-01-18 15:46:22,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4014 states. [2022-01-18 15:46:22,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4014 to 3796. [2022-01-18 15:46:22,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.257971014492754) internal successors, (16159), 3795 states have internal predecessors, (16159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:22,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 16159 transitions. [2022-01-18 15:46:22,568 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 16159 transitions. Word has length 23 [2022-01-18 15:46:22,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:22,568 INFO L470 AbstractCegarLoop]: Abstraction has 3796 states and 16159 transitions. [2022-01-18 15:46:22,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:22,568 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 16159 transitions. [2022-01-18 15:46:22,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:46:22,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:22,574 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:22,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:22,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:22,775 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:46:22,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:22,775 INFO L85 PathProgramCache]: Analyzing trace with hash 2072855730, now seen corresponding path program 21 times [2022-01-18 15:46:22,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:22,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115597683] [2022-01-18 15:46:22,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:22,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:22,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:22,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:22,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:22,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115597683] [2022-01-18 15:46:22,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115597683] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:22,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37921011] [2022-01-18 15:46:22,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:46:22,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:22,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:22,934 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:22,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-01-18 15:46:22,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:46:22,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:22,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:46:22,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:23,078 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 15:46:23,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 51 [2022-01-18 15:46:23,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:23,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:23,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:23,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37921011] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:23,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:23,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:46:23,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648726814] [2022-01-18 15:46:23,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:23,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:46:23,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:23,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:46:23,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:46:23,384 INFO L87 Difference]: Start difference. First operand 3796 states and 16159 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:24,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:24,653 INFO L93 Difference]: Finished difference Result 5015 states and 20933 transitions. [2022-01-18 15:46:24,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 15:46:24,653 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:46:24,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:24,664 INFO L225 Difference]: With dead ends: 5015 [2022-01-18 15:46:24,665 INFO L226 Difference]: Without dead ends: 4994 [2022-01-18 15:46:24,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=350, Invalid=2100, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 15:46:24,665 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 362 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:24,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 422 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1098 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:46:24,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4994 states. [2022-01-18 15:46:24,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4994 to 3808. [2022-01-18 15:46:24,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 3807 states have (on average 4.260047281323877) internal successors, (16218), 3807 states have internal predecessors, (16218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:24,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 16218 transitions. [2022-01-18 15:46:24,752 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 16218 transitions. Word has length 23 [2022-01-18 15:46:24,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:24,752 INFO L470 AbstractCegarLoop]: Abstraction has 3808 states and 16218 transitions. [2022-01-18 15:46:24,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:24,752 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 16218 transitions. [2022-01-18 15:46:24,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:46:24,758 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:24,758 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:24,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:24,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-01-18 15:46:24,959 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:46:24,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:24,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1146400410, now seen corresponding path program 22 times [2022-01-18 15:46:24,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:24,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080553825] [2022-01-18 15:46:24,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:24,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:24,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:25,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:25,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:25,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080553825] [2022-01-18 15:46:25,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080553825] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:25,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161115070] [2022-01-18 15:46:25,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:46:25,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:25,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:25,126 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:25,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-01-18 15:46:25,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:46:25,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:25,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:46:25,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:25,307 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:25,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2022-01-18 15:46:25,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:25,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:25,853 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:25,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:46:25,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:25,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:46:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:25,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161115070] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:25,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:25,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:46:25,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899523142] [2022-01-18 15:46:25,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:25,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:46:25,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:25,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:46:25,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:46:25,922 INFO L87 Difference]: Start difference. First operand 3808 states and 16218 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:26,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:26,807 INFO L93 Difference]: Finished difference Result 4082 states and 17246 transitions. [2022-01-18 15:46:26,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:46:26,808 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:46:26,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:26,816 INFO L225 Difference]: With dead ends: 4082 [2022-01-18 15:46:26,816 INFO L226 Difference]: Without dead ends: 4067 [2022-01-18 15:46:26,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=213, Invalid=1347, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:46:26,817 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 250 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:26,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 446 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1028 Invalid, 0 Unknown, 88 Unchecked, 0.4s Time] [2022-01-18 15:46:26,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4067 states. [2022-01-18 15:46:26,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4067 to 3808. [2022-01-18 15:46:26,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 3807 states have (on average 4.260047281323877) internal successors, (16218), 3807 states have internal predecessors, (16218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:26,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 16218 transitions. [2022-01-18 15:46:26,908 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 16218 transitions. Word has length 23 [2022-01-18 15:46:26,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:26,908 INFO L470 AbstractCegarLoop]: Abstraction has 3808 states and 16218 transitions. [2022-01-18 15:46:26,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:26,908 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 16218 transitions. [2022-01-18 15:46:26,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:46:26,914 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:26,914 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:26,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-01-18 15:46:27,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-01-18 15:46:27,115 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:46:27,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:27,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1650319270, now seen corresponding path program 23 times [2022-01-18 15:46:27,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:27,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206154946] [2022-01-18 15:46:27,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:27,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:27,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:27,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:27,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:27,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206154946] [2022-01-18 15:46:27,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206154946] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:27,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74336041] [2022-01-18 15:46:27,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:46:27,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:27,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:27,277 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:27,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-01-18 15:46:27,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:46:27,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:27,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:46:27,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:27,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:27,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:27,544 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:27,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 46 [2022-01-18 15:46:27,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:27,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:28,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:28,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-01-18 15:46:28,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:28,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74336041] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:28,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:28,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-18 15:46:28,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179508356] [2022-01-18 15:46:28,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:28,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:46:28,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:28,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:46:28,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:46:28,156 INFO L87 Difference]: Start difference. First operand 3808 states and 16218 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:29,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:29,378 INFO L93 Difference]: Finished difference Result 4774 states and 19966 transitions. [2022-01-18 15:46:29,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 15:46:29,378 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:46:29,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:29,389 INFO L225 Difference]: With dead ends: 4774 [2022-01-18 15:46:29,389 INFO L226 Difference]: Without dead ends: 4739 [2022-01-18 15:46:29,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=340, Invalid=2110, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 15:46:29,390 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 305 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 348 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:29,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 689 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1020 Invalid, 0 Unknown, 348 Unchecked, 0.5s Time] [2022-01-18 15:46:29,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4739 states. [2022-01-18 15:46:29,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4739 to 3910. [2022-01-18 15:46:29,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3910 states, 3909 states have (on average 4.273727295983628) internal successors, (16706), 3909 states have internal predecessors, (16706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:29,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3910 states to 3910 states and 16706 transitions. [2022-01-18 15:46:29,477 INFO L78 Accepts]: Start accepts. Automaton has 3910 states and 16706 transitions. Word has length 23 [2022-01-18 15:46:29,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:29,477 INFO L470 AbstractCegarLoop]: Abstraction has 3910 states and 16706 transitions. [2022-01-18 15:46:29,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:29,477 INFO L276 IsEmpty]: Start isEmpty. Operand 3910 states and 16706 transitions. [2022-01-18 15:46:29,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:46:29,483 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:29,483 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:29,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-01-18 15:46:29,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:29,684 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:46:29,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:29,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1104393394, now seen corresponding path program 24 times [2022-01-18 15:46:29,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:29,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841579059] [2022-01-18 15:46:29,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:29,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:29,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:29,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:29,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841579059] [2022-01-18 15:46:29,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841579059] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:29,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386691053] [2022-01-18 15:46:29,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:46:29,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:29,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:29,838 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:29,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-01-18 15:46:29,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:46:29,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:29,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:46:29,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:30,035 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:30,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2022-01-18 15:46:30,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:30,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:30,516 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:30,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:46:30,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:30,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:46:30,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:30,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386691053] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:30,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:30,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:46:30,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516394964] [2022-01-18 15:46:30,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:30,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:46:30,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:30,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:46:30,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:46:30,567 INFO L87 Difference]: Start difference. First operand 3910 states and 16706 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:31,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:31,219 INFO L93 Difference]: Finished difference Result 4220 states and 17894 transitions. [2022-01-18 15:46:31,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:46:31,220 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:46:31,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:31,229 INFO L225 Difference]: With dead ends: 4220 [2022-01-18 15:46:31,229 INFO L226 Difference]: Without dead ends: 4205 [2022-01-18 15:46:31,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:46:31,230 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 135 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:31,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 433 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1058 Invalid, 0 Unknown, 144 Unchecked, 0.4s Time] [2022-01-18 15:46:31,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4205 states. [2022-01-18 15:46:31,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4205 to 3916. [2022-01-18 15:46:31,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 4.274074074074074) internal successors, (16733), 3915 states have internal predecessors, (16733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:31,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 16733 transitions. [2022-01-18 15:46:31,289 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 16733 transitions. Word has length 23 [2022-01-18 15:46:31,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:31,289 INFO L470 AbstractCegarLoop]: Abstraction has 3916 states and 16733 transitions. [2022-01-18 15:46:31,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:31,289 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 16733 transitions. [2022-01-18 15:46:31,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:46:31,295 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:31,295 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:31,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-01-18 15:46:31,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:31,495 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:46:31,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:31,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1689727346, now seen corresponding path program 25 times [2022-01-18 15:46:31,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:31,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415787788] [2022-01-18 15:46:31,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:31,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:31,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:31,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:31,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415787788] [2022-01-18 15:46:31,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415787788] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:31,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992795000] [2022-01-18 15:46:31,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:46:31,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:31,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:31,676 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:31,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-01-18 15:46:31,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:31,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:46:31,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:31,887 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:31,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:46:32,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:32,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:32,441 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:32,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:46:32,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:32,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:46:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:32,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992795000] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:32,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:32,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:46:32,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893872450] [2022-01-18 15:46:32,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:32,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:46:32,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:32,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:46:32,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:46:32,498 INFO L87 Difference]: Start difference. First operand 3916 states and 16733 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:33,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:33,415 INFO L93 Difference]: Finished difference Result 4209 states and 17859 transitions. [2022-01-18 15:46:33,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:46:33,416 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:46:33,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:33,425 INFO L225 Difference]: With dead ends: 4209 [2022-01-18 15:46:33,425 INFO L226 Difference]: Without dead ends: 4187 [2022-01-18 15:46:33,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=265, Invalid=1375, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:46:33,426 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 187 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:33,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 378 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 980 Invalid, 0 Unknown, 172 Unchecked, 0.4s Time] [2022-01-18 15:46:33,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4187 states. [2022-01-18 15:46:33,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4187 to 3920. [2022-01-18 15:46:33,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 4.273794335289614) internal successors, (16749), 3919 states have internal predecessors, (16749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:33,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 16749 transitions. [2022-01-18 15:46:33,484 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 16749 transitions. Word has length 23 [2022-01-18 15:46:33,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:33,484 INFO L470 AbstractCegarLoop]: Abstraction has 3920 states and 16749 transitions. [2022-01-18 15:46:33,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:33,484 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 16749 transitions. [2022-01-18 15:46:33,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:46:33,491 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:33,491 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:33,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:33,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-01-18 15:46:33,692 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:46:33,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:33,692 INFO L85 PathProgramCache]: Analyzing trace with hash -991673216, now seen corresponding path program 26 times [2022-01-18 15:46:33,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:33,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711868118] [2022-01-18 15:46:33,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:33,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:33,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:33,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:33,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711868118] [2022-01-18 15:46:33,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711868118] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:33,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501010435] [2022-01-18 15:46:33,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:46:33,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:33,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:33,864 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:33,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-01-18 15:46:33,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:46:33,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:33,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:46:33,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:34,050 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:34,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:46:34,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:34,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:34,631 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:34,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:46:34,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:34,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:46:34,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:34,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501010435] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:34,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:34,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:46:34,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142487729] [2022-01-18 15:46:34,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:34,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:46:34,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:34,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:46:34,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:46:34,685 INFO L87 Difference]: Start difference. First operand 3920 states and 16749 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:35,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:35,524 INFO L93 Difference]: Finished difference Result 4191 states and 17790 transitions. [2022-01-18 15:46:35,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:46:35,525 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:46:35,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:35,533 INFO L225 Difference]: With dead ends: 4191 [2022-01-18 15:46:35,534 INFO L226 Difference]: Without dead ends: 4176 [2022-01-18 15:46:35,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:46:35,534 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 164 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:35,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 357 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 957 Invalid, 0 Unknown, 153 Unchecked, 0.4s Time] [2022-01-18 15:46:35,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2022-01-18 15:46:35,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 3920. [2022-01-18 15:46:35,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 4.273794335289614) internal successors, (16749), 3919 states have internal predecessors, (16749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:35,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 16749 transitions. [2022-01-18 15:46:35,601 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 16749 transitions. Word has length 23 [2022-01-18 15:46:35,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:35,601 INFO L470 AbstractCegarLoop]: Abstraction has 3920 states and 16749 transitions. [2022-01-18 15:46:35,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:35,601 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 16749 transitions. [2022-01-18 15:46:35,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:46:35,613 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:35,613 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:35,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:35,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-01-18 15:46:35,827 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:46:35,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:35,828 INFO L85 PathProgramCache]: Analyzing trace with hash 877172014, now seen corresponding path program 27 times [2022-01-18 15:46:35,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:35,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106648238] [2022-01-18 15:46:35,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:35,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:35,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:35,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:35,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:35,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106648238] [2022-01-18 15:46:35,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106648238] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:35,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572918102] [2022-01-18 15:46:35,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:46:35,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:35,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:35,987 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:35,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-01-18 15:46:36,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:46:36,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:36,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:46:36,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:36,185 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:36,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:46:36,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:36,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:36,669 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:36,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:46:36,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:36,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:46:36,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:36,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572918102] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:36,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:36,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:46:36,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984369796] [2022-01-18 15:46:36,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:36,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:46:36,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:36,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:46:36,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:46:36,721 INFO L87 Difference]: Start difference. First operand 3920 states and 16749 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:37,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:37,527 INFO L93 Difference]: Finished difference Result 4185 states and 17760 transitions. [2022-01-18 15:46:37,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:46:37,527 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:46:37,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:37,537 INFO L225 Difference]: With dead ends: 4185 [2022-01-18 15:46:37,537 INFO L226 Difference]: Without dead ends: 4170 [2022-01-18 15:46:37,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:46:37,537 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 122 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 1311 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:37,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 523 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1311 Invalid, 0 Unknown, 82 Unchecked, 0.6s Time] [2022-01-18 15:46:37,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2022-01-18 15:46:37,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 3924. [2022-01-18 15:46:37,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.274024980881978) internal successors, (16767), 3923 states have internal predecessors, (16767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:37,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16767 transitions. [2022-01-18 15:46:37,628 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16767 transitions. Word has length 23 [2022-01-18 15:46:37,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:37,628 INFO L470 AbstractCegarLoop]: Abstraction has 3924 states and 16767 transitions. [2022-01-18 15:46:37,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:37,628 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16767 transitions. [2022-01-18 15:46:37,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:46:37,637 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:37,638 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:37,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:37,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:37,851 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:46:37,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:37,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1390698866, now seen corresponding path program 28 times [2022-01-18 15:46:37,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:37,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746160014] [2022-01-18 15:46:37,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:37,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:38,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:38,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746160014] [2022-01-18 15:46:38,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746160014] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:38,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719620702] [2022-01-18 15:46:38,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:46:38,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:38,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:38,003 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:38,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-01-18 15:46:38,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:46:38,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:38,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:46:38,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:38,182 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:38,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:46:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:38,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:38,726 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:38,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:46:38,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:38,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:46:38,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:38,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719620702] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:38,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:38,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:46:38,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218566565] [2022-01-18 15:46:38,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:38,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:46:38,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:38,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:46:38,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:46:38,780 INFO L87 Difference]: Start difference. First operand 3924 states and 16767 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:39,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:39,598 INFO L93 Difference]: Finished difference Result 4235 states and 17921 transitions. [2022-01-18 15:46:39,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:46:39,598 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:46:39,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:39,608 INFO L225 Difference]: With dead ends: 4235 [2022-01-18 15:46:39,608 INFO L226 Difference]: Without dead ends: 4189 [2022-01-18 15:46:39,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=1275, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:46:39,608 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 153 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:39,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 431 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1035 Invalid, 0 Unknown, 56 Unchecked, 0.4s Time] [2022-01-18 15:46:39,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4189 states. [2022-01-18 15:46:39,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4189 to 3944. [2022-01-18 15:46:39,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3944 states, 3943 states have (on average 4.273903119452194) internal successors, (16852), 3943 states have internal predecessors, (16852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:39,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3944 states to 3944 states and 16852 transitions. [2022-01-18 15:46:39,670 INFO L78 Accepts]: Start accepts. Automaton has 3944 states and 16852 transitions. Word has length 23 [2022-01-18 15:46:39,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:39,670 INFO L470 AbstractCegarLoop]: Abstraction has 3944 states and 16852 transitions. [2022-01-18 15:46:39,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:39,670 INFO L276 IsEmpty]: Start isEmpty. Operand 3944 states and 16852 transitions. [2022-01-18 15:46:39,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:46:39,676 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:39,676 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:39,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:39,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:39,877 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:46:39,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:39,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1828557274, now seen corresponding path program 29 times [2022-01-18 15:46:39,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:39,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458516802] [2022-01-18 15:46:39,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:39,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:39,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:40,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:40,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:40,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458516802] [2022-01-18 15:46:40,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458516802] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:40,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505877786] [2022-01-18 15:46:40,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:46:40,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:40,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:40,032 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:40,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-01-18 15:46:40,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:46:40,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:40,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:46:40,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:40,212 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:40,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:46:40,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:40,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:40,846 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:40,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:46:40,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:40,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:46:40,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:40,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505877786] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:40,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:40,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:46:40,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679088526] [2022-01-18 15:46:40,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:40,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:46:40,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:40,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:46:40,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:46:40,896 INFO L87 Difference]: Start difference. First operand 3944 states and 16852 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:41,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:41,636 INFO L93 Difference]: Finished difference Result 4217 states and 17859 transitions. [2022-01-18 15:46:41,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:46:41,636 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:46:41,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:41,645 INFO L225 Difference]: With dead ends: 4217 [2022-01-18 15:46:41,645 INFO L226 Difference]: Without dead ends: 4181 [2022-01-18 15:46:41,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:46:41,646 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 143 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:41,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 408 Invalid, 1214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1111 Invalid, 0 Unknown, 50 Unchecked, 0.5s Time] [2022-01-18 15:46:41,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2022-01-18 15:46:41,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 3940. [2022-01-18 15:46:41,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3940 states, 3939 states have (on average 4.274181264280275) internal successors, (16836), 3939 states have internal predecessors, (16836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:41,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3940 states to 3940 states and 16836 transitions. [2022-01-18 15:46:41,704 INFO L78 Accepts]: Start accepts. Automaton has 3940 states and 16836 transitions. Word has length 23 [2022-01-18 15:46:41,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:41,704 INFO L470 AbstractCegarLoop]: Abstraction has 3940 states and 16836 transitions. [2022-01-18 15:46:41,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:41,704 INFO L276 IsEmpty]: Start isEmpty. Operand 3940 states and 16836 transitions. [2022-01-18 15:46:41,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:46:41,710 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:41,711 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:41,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:41,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:41,911 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:46:41,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:41,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1547561422, now seen corresponding path program 30 times [2022-01-18 15:46:41,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:41,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765376859] [2022-01-18 15:46:41,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:41,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:41,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:42,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:42,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:42,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765376859] [2022-01-18 15:46:42,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765376859] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:42,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921135772] [2022-01-18 15:46:42,081 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:46:42,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:42,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:42,082 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:42,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-01-18 15:46:42,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:46:42,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:42,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:46:42,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:42,243 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:42,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:46:42,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:42,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:42,942 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:42,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:46:42,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:42,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:46:42,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:42,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921135772] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:42,994 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:42,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:46:42,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640828952] [2022-01-18 15:46:42,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:42,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:46:42,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:42,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:46:42,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:46:42,995 INFO L87 Difference]: Start difference. First operand 3940 states and 16836 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:43,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:43,824 INFO L93 Difference]: Finished difference Result 4219 states and 17905 transitions. [2022-01-18 15:46:43,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:46:43,825 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:46:43,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:43,834 INFO L225 Difference]: With dead ends: 4219 [2022-01-18 15:46:43,834 INFO L226 Difference]: Without dead ends: 4197 [2022-01-18 15:46:43,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=248, Invalid=1312, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:46:43,835 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 224 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:43,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 267 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 643 Invalid, 0 Unknown, 119 Unchecked, 0.3s Time] [2022-01-18 15:46:43,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4197 states. [2022-01-18 15:46:43,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4197 to 3949. [2022-01-18 15:46:43,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3949 states, 3948 states have (on average 4.272543059777102) internal successors, (16868), 3948 states have internal predecessors, (16868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:43,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3949 states to 3949 states and 16868 transitions. [2022-01-18 15:46:43,894 INFO L78 Accepts]: Start accepts. Automaton has 3949 states and 16868 transitions. Word has length 23 [2022-01-18 15:46:43,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:43,894 INFO L470 AbstractCegarLoop]: Abstraction has 3949 states and 16868 transitions. [2022-01-18 15:46:43,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:43,894 INFO L276 IsEmpty]: Start isEmpty. Operand 3949 states and 16868 transitions. [2022-01-18 15:46:43,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:46:43,900 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:43,900 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:43,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:44,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-01-18 15:46:44,100 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:46:44,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:44,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1705829806, now seen corresponding path program 31 times [2022-01-18 15:46:44,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:44,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34939542] [2022-01-18 15:46:44,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:44,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:44,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:44,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:44,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34939542] [2022-01-18 15:46:44,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34939542] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:44,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93473466] [2022-01-18 15:46:44,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:46:44,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:44,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:44,302 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:44,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-01-18 15:46:44,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:44,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:46:44,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:44,461 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:44,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:46:44,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:44,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:45,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:45,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:46:45,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:45,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:46:45,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:45,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93473466] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:45,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:45,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:46:45,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555063552] [2022-01-18 15:46:45,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:45,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:46:45,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:45,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:46:45,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:46:45,171 INFO L87 Difference]: Start difference. First operand 3949 states and 16868 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:45,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:45,945 INFO L93 Difference]: Finished difference Result 4281 states and 18148 transitions. [2022-01-18 15:46:45,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:46:45,946 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:46:45,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:45,955 INFO L225 Difference]: With dead ends: 4281 [2022-01-18 15:46:45,956 INFO L226 Difference]: Without dead ends: 4257 [2022-01-18 15:46:45,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:46:45,956 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 119 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:45,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 364 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 943 Invalid, 0 Unknown, 141 Unchecked, 0.4s Time] [2022-01-18 15:46:45,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4257 states. [2022-01-18 15:46:46,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4257 to 3946. [2022-01-18 15:46:46,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3946 states, 3945 states have (on average 4.273764258555133) internal successors, (16860), 3945 states have internal predecessors, (16860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:46,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3946 states to 3946 states and 16860 transitions. [2022-01-18 15:46:46,057 INFO L78 Accepts]: Start accepts. Automaton has 3946 states and 16860 transitions. Word has length 23 [2022-01-18 15:46:46,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:46,057 INFO L470 AbstractCegarLoop]: Abstraction has 3946 states and 16860 transitions. [2022-01-18 15:46:46,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:46,058 INFO L276 IsEmpty]: Start isEmpty. Operand 3946 states and 16860 transitions. [2022-01-18 15:46:46,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:46:46,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:46,066 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:46,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-01-18 15:46:46,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-01-18 15:46:46,288 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:46:46,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:46,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1418708454, now seen corresponding path program 32 times [2022-01-18 15:46:46,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:46,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235325078] [2022-01-18 15:46:46,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:46,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:46,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:46,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:46,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:46,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235325078] [2022-01-18 15:46:46,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235325078] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:46,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183214936] [2022-01-18 15:46:46,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:46:46,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:46,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:46,464 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:46,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-01-18 15:46:46,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:46:46,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:46,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:46:46,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:46,626 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:46,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:46:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:47,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:47,196 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:47,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:46:47,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:47,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:46:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:47,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183214936] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:47,250 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:47,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:46:47,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14537225] [2022-01-18 15:46:47,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:47,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:46:47,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:47,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:46:47,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:46:47,250 INFO L87 Difference]: Start difference. First operand 3946 states and 16860 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:48,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:48,113 INFO L93 Difference]: Finished difference Result 4269 states and 18103 transitions. [2022-01-18 15:46:48,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:46:48,114 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:46:48,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:48,124 INFO L225 Difference]: With dead ends: 4269 [2022-01-18 15:46:48,124 INFO L226 Difference]: Without dead ends: 4247 [2022-01-18 15:46:48,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:46:48,124 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 183 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:48,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 325 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 812 Invalid, 0 Unknown, 153 Unchecked, 0.4s Time] [2022-01-18 15:46:48,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4247 states. [2022-01-18 15:46:48,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4247 to 3950. [2022-01-18 15:46:48,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3950 states, 3949 states have (on average 4.273486958723727) internal successors, (16876), 3949 states have internal predecessors, (16876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:48,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3950 states to 3950 states and 16876 transitions. [2022-01-18 15:46:48,182 INFO L78 Accepts]: Start accepts. Automaton has 3950 states and 16876 transitions. Word has length 23 [2022-01-18 15:46:48,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:48,182 INFO L470 AbstractCegarLoop]: Abstraction has 3950 states and 16876 transitions. [2022-01-18 15:46:48,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:48,182 INFO L276 IsEmpty]: Start isEmpty. Operand 3950 states and 16876 transitions. [2022-01-18 15:46:48,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:46:48,188 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:48,188 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:48,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:48,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-01-18 15:46:48,388 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:46:48,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:48,389 INFO L85 PathProgramCache]: Analyzing trace with hash 925491068, now seen corresponding path program 33 times [2022-01-18 15:46:48,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:48,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587642794] [2022-01-18 15:46:48,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:48,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:48,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:48,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:48,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:48,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587642794] [2022-01-18 15:46:48,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587642794] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:48,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918283079] [2022-01-18 15:46:48,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:46:48,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:48,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:48,573 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:48,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-01-18 15:46:48,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:46:48,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:48,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:46:48,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:48,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:48,758 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 15:46:48,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-01-18 15:46:48,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:48,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:49,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:49,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918283079] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:49,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:49,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-18 15:46:49,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515955086] [2022-01-18 15:46:49,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:49,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:46:49,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:49,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:46:49,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:46:49,221 INFO L87 Difference]: Start difference. First operand 3950 states and 16876 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:51,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:51,021 INFO L93 Difference]: Finished difference Result 4792 states and 20174 transitions. [2022-01-18 15:46:51,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 15:46:51,021 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:46:51,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:51,032 INFO L225 Difference]: With dead ends: 4792 [2022-01-18 15:46:51,032 INFO L226 Difference]: Without dead ends: 4762 [2022-01-18 15:46:51,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=454, Invalid=2738, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 15:46:51,033 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 398 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 1448 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 1630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:51,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 480 Invalid, 1630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1448 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 15:46:51,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4762 states. [2022-01-18 15:46:51,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4762 to 3958. [2022-01-18 15:46:51,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3958 states, 3957 states have (on average 4.273692191053828) internal successors, (16911), 3957 states have internal predecessors, (16911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:51,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3958 states to 3958 states and 16911 transitions. [2022-01-18 15:46:51,097 INFO L78 Accepts]: Start accepts. Automaton has 3958 states and 16911 transitions. Word has length 23 [2022-01-18 15:46:51,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:51,098 INFO L470 AbstractCegarLoop]: Abstraction has 3958 states and 16911 transitions. [2022-01-18 15:46:51,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:51,098 INFO L276 IsEmpty]: Start isEmpty. Operand 3958 states and 16911 transitions. [2022-01-18 15:46:51,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:46:51,104 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:51,104 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:51,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-01-18 15:46:51,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:51,307 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:46:51,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:51,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1860267324, now seen corresponding path program 34 times [2022-01-18 15:46:51,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:51,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986032803] [2022-01-18 15:46:51,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:51,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:51,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:51,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:51,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986032803] [2022-01-18 15:46:51,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986032803] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:51,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003752238] [2022-01-18 15:46:51,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:46:51,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:51,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:51,482 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:51,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-01-18 15:46:51,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:46:51,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:51,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:46:51,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:51,655 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:51,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:46:52,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:52,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:52,311 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:52,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:46:52,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:52,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:46:52,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:52,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003752238] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:52,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:52,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:46:52,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389710103] [2022-01-18 15:46:52,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:52,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:46:52,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:52,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:46:52,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:46:52,362 INFO L87 Difference]: Start difference. First operand 3958 states and 16911 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:53,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:53,318 INFO L93 Difference]: Finished difference Result 4372 states and 18469 transitions. [2022-01-18 15:46:53,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:46:53,318 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:46:53,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:53,329 INFO L225 Difference]: With dead ends: 4372 [2022-01-18 15:46:53,329 INFO L226 Difference]: Without dead ends: 4326 [2022-01-18 15:46:53,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:46:53,330 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 128 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:53,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 429 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1134 Invalid, 0 Unknown, 93 Unchecked, 0.5s Time] [2022-01-18 15:46:53,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2022-01-18 15:46:53,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 3968. [2022-01-18 15:46:53,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3968 states, 3967 states have (on average 4.2730022687169145) internal successors, (16951), 3967 states have internal predecessors, (16951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:53,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3968 states to 3968 states and 16951 transitions. [2022-01-18 15:46:53,393 INFO L78 Accepts]: Start accepts. Automaton has 3968 states and 16951 transitions. Word has length 23 [2022-01-18 15:46:53,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:53,393 INFO L470 AbstractCegarLoop]: Abstraction has 3968 states and 16951 transitions. [2022-01-18 15:46:53,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:53,393 INFO L276 IsEmpty]: Start isEmpty. Operand 3968 states and 16951 transitions. [2022-01-18 15:46:53,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:46:53,399 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:53,400 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:53,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-01-18 15:46:53,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:53,601 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:46:53,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:53,601 INFO L85 PathProgramCache]: Analyzing trace with hash 847574792, now seen corresponding path program 35 times [2022-01-18 15:46:53,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:53,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449368481] [2022-01-18 15:46:53,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:53,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:53,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:53,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:53,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:53,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449368481] [2022-01-18 15:46:53,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449368481] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:53,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055991666] [2022-01-18 15:46:53,780 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:46:53,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:53,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:53,781 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:53,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-01-18 15:46:53,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:46:53,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:53,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:46:53,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:53,945 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:53,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:46:54,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:54,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:54,575 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:54,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:46:54,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:54,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:46:54,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:54,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055991666] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:54,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:54,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:46:54,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799714558] [2022-01-18 15:46:54,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:54,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:46:54,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:54,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:46:54,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:46:54,629 INFO L87 Difference]: Start difference. First operand 3968 states and 16951 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:55,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:55,388 INFO L93 Difference]: Finished difference Result 4280 states and 18112 transitions. [2022-01-18 15:46:55,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:46:55,388 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:46:55,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:55,398 INFO L225 Difference]: With dead ends: 4280 [2022-01-18 15:46:55,398 INFO L226 Difference]: Without dead ends: 4244 [2022-01-18 15:46:55,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:46:55,398 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 116 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:55,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 387 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1109 Invalid, 0 Unknown, 94 Unchecked, 0.5s Time] [2022-01-18 15:46:55,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4244 states. [2022-01-18 15:46:55,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4244 to 3960. [2022-01-18 15:46:55,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3960 states, 3959 states have (on average 4.273553927759536) internal successors, (16919), 3959 states have internal predecessors, (16919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:55,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3960 states to 3960 states and 16919 transitions. [2022-01-18 15:46:55,457 INFO L78 Accepts]: Start accepts. Automaton has 3960 states and 16919 transitions. Word has length 23 [2022-01-18 15:46:55,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:55,457 INFO L470 AbstractCegarLoop]: Abstraction has 3960 states and 16919 transitions. [2022-01-18 15:46:55,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:55,458 INFO L276 IsEmpty]: Start isEmpty. Operand 3960 states and 16919 transitions. [2022-01-18 15:46:55,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:46:55,464 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:55,464 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:55,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:55,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-01-18 15:46:55,665 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:46:55,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:55,665 INFO L85 PathProgramCache]: Analyzing trace with hash -168540314, now seen corresponding path program 36 times [2022-01-18 15:46:55,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:55,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665473289] [2022-01-18 15:46:55,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:55,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:55,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:55,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:55,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:55,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665473289] [2022-01-18 15:46:55,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665473289] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:55,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836917024] [2022-01-18 15:46:55,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:46:55,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:55,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:55,817 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:55,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-01-18 15:46:55,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:46:55,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:46:55,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:46:55,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:56,020 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:56,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2022-01-18 15:46:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:56,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:56,503 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:56,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:46:56,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:56,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:46:56,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:56,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836917024] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:56,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:56,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:46:56,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935108327] [2022-01-18 15:46:56,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:56,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:46:56,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:56,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:46:56,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:46:56,557 INFO L87 Difference]: Start difference. First operand 3960 states and 16919 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:57,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:57,322 INFO L93 Difference]: Finished difference Result 4245 states and 18006 transitions. [2022-01-18 15:46:57,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:46:57,322 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:46:57,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:57,332 INFO L225 Difference]: With dead ends: 4245 [2022-01-18 15:46:57,332 INFO L226 Difference]: Without dead ends: 4230 [2022-01-18 15:46:57,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=957, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:46:57,332 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 123 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:57,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 537 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1375 Invalid, 0 Unknown, 156 Unchecked, 0.5s Time] [2022-01-18 15:46:57,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4230 states. [2022-01-18 15:46:57,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4230 to 3968. [2022-01-18 15:46:57,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3968 states, 3967 states have (on average 4.273506428031258) internal successors, (16953), 3967 states have internal predecessors, (16953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:57,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3968 states to 3968 states and 16953 transitions. [2022-01-18 15:46:57,392 INFO L78 Accepts]: Start accepts. Automaton has 3968 states and 16953 transitions. Word has length 23 [2022-01-18 15:46:57,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:57,392 INFO L470 AbstractCegarLoop]: Abstraction has 3968 states and 16953 transitions. [2022-01-18 15:46:57,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:57,392 INFO L276 IsEmpty]: Start isEmpty. Operand 3968 states and 16953 transitions. [2022-01-18 15:46:57,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:46:57,399 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:57,399 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:57,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-01-18 15:46:57,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-01-18 15:46:57,599 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:46:57,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:57,599 INFO L85 PathProgramCache]: Analyzing trace with hash 416793638, now seen corresponding path program 37 times [2022-01-18 15:46:57,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:57,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755442825] [2022-01-18 15:46:57,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:57,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:57,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:57,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:57,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:46:57,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755442825] [2022-01-18 15:46:57,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755442825] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:46:57,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930299530] [2022-01-18 15:46:57,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:46:57,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:57,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:46:57,765 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:46:57,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-01-18 15:46:57,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:46:57,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:46:57,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:46:57,966 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:57,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:46:58,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:58,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:46:58,476 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:46:58,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:46:58,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:46:58,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:46:58,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:46:58,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930299530] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:46:58,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:46:58,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:46:58,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283444772] [2022-01-18 15:46:58,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:46:58,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:46:58,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:46:58,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:46:58,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:46:58,537 INFO L87 Difference]: Start difference. First operand 3968 states and 16953 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:59,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:46:59,581 INFO L93 Difference]: Finished difference Result 4261 states and 18065 transitions. [2022-01-18 15:46:59,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:46:59,581 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:46:59,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:46:59,591 INFO L225 Difference]: With dead ends: 4261 [2022-01-18 15:46:59,592 INFO L226 Difference]: Without dead ends: 4239 [2022-01-18 15:46:59,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=282, Invalid=1440, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:46:59,592 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 149 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:46:59,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 403 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1064 Invalid, 0 Unknown, 159 Unchecked, 0.5s Time] [2022-01-18 15:46:59,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4239 states. [2022-01-18 15:46:59,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4239 to 3972. [2022-01-18 15:46:59,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3972 states, 3971 states have (on average 4.273230924200453) internal successors, (16969), 3971 states have internal predecessors, (16969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:59,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3972 states to 3972 states and 16969 transitions. [2022-01-18 15:46:59,654 INFO L78 Accepts]: Start accepts. Automaton has 3972 states and 16969 transitions. Word has length 23 [2022-01-18 15:46:59,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:46:59,654 INFO L470 AbstractCegarLoop]: Abstraction has 3972 states and 16969 transitions. [2022-01-18 15:46:59,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:46:59,654 INFO L276 IsEmpty]: Start isEmpty. Operand 3972 states and 16969 transitions. [2022-01-18 15:46:59,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:46:59,661 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:46:59,661 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:46:59,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-01-18 15:46:59,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:46:59,863 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:46:59,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:46:59,863 INFO L85 PathProgramCache]: Analyzing trace with hash 2030360372, now seen corresponding path program 38 times [2022-01-18 15:46:59,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:46:59,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989235692] [2022-01-18 15:46:59,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:46:59,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:46:59,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:00,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:00,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:00,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989235692] [2022-01-18 15:47:00,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989235692] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:00,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667359846] [2022-01-18 15:47:00,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:47:00,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:00,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:00,039 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:00,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-01-18 15:47:00,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:47:00,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:00,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:47:00,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:00,226 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:00,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:47:00,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:00,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:00,831 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:00,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:47:00,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:00,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:47:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:00,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667359846] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:00,889 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:00,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:47:00,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498181520] [2022-01-18 15:47:00,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:00,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:47:00,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:00,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:47:00,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:47:00,890 INFO L87 Difference]: Start difference. First operand 3972 states and 16969 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:02,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:02,032 INFO L93 Difference]: Finished difference Result 4244 states and 18007 transitions. [2022-01-18 15:47:02,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:47:02,032 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:47:02,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:02,042 INFO L225 Difference]: With dead ends: 4244 [2022-01-18 15:47:02,042 INFO L226 Difference]: Without dead ends: 4229 [2022-01-18 15:47:02,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=259, Invalid=1300, Unknown=1, NotChecked=0, Total=1560 [2022-01-18 15:47:02,042 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 147 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:02,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 333 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 905 Invalid, 0 Unknown, 156 Unchecked, 0.4s Time] [2022-01-18 15:47:02,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4229 states. [2022-01-18 15:47:02,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4229 to 3964. [2022-01-18 15:47:02,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3964 states, 3963 states have (on average 4.273277819833459) internal successors, (16935), 3963 states have internal predecessors, (16935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:02,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3964 states to 3964 states and 16935 transitions. [2022-01-18 15:47:02,105 INFO L78 Accepts]: Start accepts. Automaton has 3964 states and 16935 transitions. Word has length 23 [2022-01-18 15:47:02,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:02,105 INFO L470 AbstractCegarLoop]: Abstraction has 3964 states and 16935 transitions. [2022-01-18 15:47:02,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:02,105 INFO L276 IsEmpty]: Start isEmpty. Operand 3964 states and 16935 transitions. [2022-01-18 15:47:02,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:47:02,112 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:02,112 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:02,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-01-18 15:47:02,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:02,312 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:47:02,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:02,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1704045700, now seen corresponding path program 39 times [2022-01-18 15:47:02,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:02,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258330474] [2022-01-18 15:47:02,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:02,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:02,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:02,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:02,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:02,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258330474] [2022-01-18 15:47:02,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258330474] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:02,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326982692] [2022-01-18 15:47:02,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:47:02,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:02,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:02,465 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:02,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-01-18 15:47:02,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:47:02,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:02,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:47:02,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:02,683 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:02,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2022-01-18 15:47:03,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:03,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:03,205 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:03,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:47:03,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:03,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:47:03,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:03,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326982692] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:03,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:03,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:47:03,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323737299] [2022-01-18 15:47:03,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:03,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:47:03,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:03,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:47:03,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:47:03,261 INFO L87 Difference]: Start difference. First operand 3964 states and 16935 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:03,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:03,878 INFO L93 Difference]: Finished difference Result 4188 states and 17783 transitions. [2022-01-18 15:47:03,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:47:03,878 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:47:03,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:03,888 INFO L225 Difference]: With dead ends: 4188 [2022-01-18 15:47:03,888 INFO L226 Difference]: Without dead ends: 4173 [2022-01-18 15:47:03,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:47:03,888 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 113 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:03,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 437 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1047 Invalid, 0 Unknown, 38 Unchecked, 0.4s Time] [2022-01-18 15:47:03,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4173 states. [2022-01-18 15:47:03,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4173 to 3964. [2022-01-18 15:47:03,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3964 states, 3963 states have (on average 4.273277819833459) internal successors, (16935), 3963 states have internal predecessors, (16935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:03,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3964 states to 3964 states and 16935 transitions. [2022-01-18 15:47:03,971 INFO L78 Accepts]: Start accepts. Automaton has 3964 states and 16935 transitions. Word has length 23 [2022-01-18 15:47:03,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:03,971 INFO L470 AbstractCegarLoop]: Abstraction has 3964 states and 16935 transitions. [2022-01-18 15:47:03,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:03,971 INFO L276 IsEmpty]: Start isEmpty. Operand 3964 states and 16935 transitions. [2022-01-18 15:47:03,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:47:03,978 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:03,978 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:03,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-01-18 15:47:04,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2022-01-18 15:47:04,178 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:47:04,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:04,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1032228548, now seen corresponding path program 40 times [2022-01-18 15:47:04,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:04,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618733591] [2022-01-18 15:47:04,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:04,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:04,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:04,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:04,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618733591] [2022-01-18 15:47:04,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618733591] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:04,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774880383] [2022-01-18 15:47:04,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:47:04,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:04,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:04,360 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:04,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-01-18 15:47:04,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:47:04,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:04,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:47:04,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:04,572 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:04,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2022-01-18 15:47:04,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:04,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:05,053 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:05,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:47:05,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:05,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:47:05,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:05,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774880383] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:05,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:05,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:47:05,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104173366] [2022-01-18 15:47:05,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:05,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:47:05,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:05,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:47:05,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:47:05,103 INFO L87 Difference]: Start difference. First operand 3964 states and 16935 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:05,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:05,707 INFO L93 Difference]: Finished difference Result 4413 states and 18671 transitions. [2022-01-18 15:47:05,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:47:05,708 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:47:05,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:05,717 INFO L225 Difference]: With dead ends: 4413 [2022-01-18 15:47:05,717 INFO L226 Difference]: Without dead ends: 4383 [2022-01-18 15:47:05,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:47:05,718 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 148 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:05,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 487 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1073 Invalid, 0 Unknown, 61 Unchecked, 0.4s Time] [2022-01-18 15:47:05,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4383 states. [2022-01-18 15:47:05,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4383 to 3972. [2022-01-18 15:47:05,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3972 states, 3971 states have (on average 4.273230924200453) internal successors, (16969), 3971 states have internal predecessors, (16969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:05,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3972 states to 3972 states and 16969 transitions. [2022-01-18 15:47:05,778 INFO L78 Accepts]: Start accepts. Automaton has 3972 states and 16969 transitions. Word has length 23 [2022-01-18 15:47:05,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:05,779 INFO L470 AbstractCegarLoop]: Abstraction has 3972 states and 16969 transitions. [2022-01-18 15:47:05,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:05,779 INFO L276 IsEmpty]: Start isEmpty. Operand 3972 states and 16969 transitions. [2022-01-18 15:47:05,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:47:05,785 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:05,785 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:05,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-01-18 15:47:05,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-01-18 15:47:05,985 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:47:05,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:05,986 INFO L85 PathProgramCache]: Analyzing trace with hash 557009460, now seen corresponding path program 41 times [2022-01-18 15:47:05,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:05,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931986931] [2022-01-18 15:47:05,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:05,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:05,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:06,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:06,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:06,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931986931] [2022-01-18 15:47:06,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931986931] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:06,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325126852] [2022-01-18 15:47:06,149 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:47:06,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:06,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:06,150 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:06,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-01-18 15:47:06,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:47:06,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:06,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:47:06,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:06,331 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:06,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:47:07,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:07,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:07,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:07,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:47:07,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:07,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:47:07,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:07,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325126852] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:07,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:07,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:47:07,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471966589] [2022-01-18 15:47:07,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:07,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:47:07,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:07,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:47:07,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:47:07,226 INFO L87 Difference]: Start difference. First operand 3972 states and 16969 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:08,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:08,063 INFO L93 Difference]: Finished difference Result 4271 states and 18083 transitions. [2022-01-18 15:47:08,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:47:08,064 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:47:08,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:08,073 INFO L225 Difference]: With dead ends: 4271 [2022-01-18 15:47:08,074 INFO L226 Difference]: Without dead ends: 4235 [2022-01-18 15:47:08,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:47:08,074 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 146 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 1226 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:08,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 479 Invalid, 1343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1226 Invalid, 0 Unknown, 58 Unchecked, 0.5s Time] [2022-01-18 15:47:08,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4235 states. [2022-01-18 15:47:08,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4235 to 3984. [2022-01-18 15:47:08,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3984 states, 3983 states have (on average 4.272909866934471) internal successors, (17019), 3983 states have internal predecessors, (17019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:08,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3984 states to 3984 states and 17019 transitions. [2022-01-18 15:47:08,134 INFO L78 Accepts]: Start accepts. Automaton has 3984 states and 17019 transitions. Word has length 23 [2022-01-18 15:47:08,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:08,134 INFO L470 AbstractCegarLoop]: Abstraction has 3984 states and 17019 transitions. [2022-01-18 15:47:08,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:08,134 INFO L276 IsEmpty]: Start isEmpty. Operand 3984 states and 17019 transitions. [2022-01-18 15:47:08,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:47:08,140 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:08,140 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:08,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-01-18 15:47:08,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-01-18 15:47:08,341 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:47:08,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:08,342 INFO L85 PathProgramCache]: Analyzing trace with hash 727824392, now seen corresponding path program 42 times [2022-01-18 15:47:08,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:08,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063824164] [2022-01-18 15:47:08,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:08,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:08,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:08,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:08,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:08,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063824164] [2022-01-18 15:47:08,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063824164] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:08,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669442483] [2022-01-18 15:47:08,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:47:08,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:08,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:08,502 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:08,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-01-18 15:47:08,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:47:08,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:08,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:47:08,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:08,709 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:08,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 42 [2022-01-18 15:47:09,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:09,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:09,190 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:09,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:47:09,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:09,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:47:09,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:09,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669442483] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:09,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:09,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:47:09,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682414211] [2022-01-18 15:47:09,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:09,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:47:09,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:09,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:47:09,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:47:09,244 INFO L87 Difference]: Start difference. First operand 3984 states and 17019 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:09,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:09,760 INFO L93 Difference]: Finished difference Result 4196 states and 17819 transitions. [2022-01-18 15:47:09,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:47:09,760 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:47:09,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:09,771 INFO L225 Difference]: With dead ends: 4196 [2022-01-18 15:47:09,771 INFO L226 Difference]: Without dead ends: 4181 [2022-01-18 15:47:09,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:47:09,771 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 87 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:09,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 473 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1015 Invalid, 0 Unknown, 72 Unchecked, 0.4s Time] [2022-01-18 15:47:09,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2022-01-18 15:47:09,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 3984. [2022-01-18 15:47:09,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3984 states, 3983 states have (on average 4.272909866934471) internal successors, (17019), 3983 states have internal predecessors, (17019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:09,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3984 states to 3984 states and 17019 transitions. [2022-01-18 15:47:09,860 INFO L78 Accepts]: Start accepts. Automaton has 3984 states and 17019 transitions. Word has length 23 [2022-01-18 15:47:09,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:09,860 INFO L470 AbstractCegarLoop]: Abstraction has 3984 states and 17019 transitions. [2022-01-18 15:47:09,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:09,861 INFO L276 IsEmpty]: Start isEmpty. Operand 3984 states and 17019 transitions. [2022-01-18 15:47:09,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:47:09,868 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:09,868 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:09,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-01-18 15:47:10,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-01-18 15:47:10,069 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:47:10,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:10,069 INFO L85 PathProgramCache]: Analyzing trace with hash 981570640, now seen corresponding path program 43 times [2022-01-18 15:47:10,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:10,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486827127] [2022-01-18 15:47:10,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:10,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:10,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:10,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:10,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:10,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486827127] [2022-01-18 15:47:10,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486827127] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:10,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172438531] [2022-01-18 15:47:10,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:47:10,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:10,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:10,272 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:10,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-01-18 15:47:10,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:10,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:47:10,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:10,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:10,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2022-01-18 15:47:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:10,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:10,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:10,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:47:10,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:10,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:47:11,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:11,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172438531] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:11,041 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:11,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:47:11,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665990835] [2022-01-18 15:47:11,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:11,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:47:11,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:11,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:47:11,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:47:11,042 INFO L87 Difference]: Start difference. First operand 3984 states and 17019 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:12,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:12,100 INFO L93 Difference]: Finished difference Result 4656 states and 19624 transitions. [2022-01-18 15:47:12,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:47:12,100 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:47:12,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:12,110 INFO L225 Difference]: With dead ends: 4656 [2022-01-18 15:47:12,111 INFO L226 Difference]: Without dead ends: 4634 [2022-01-18 15:47:12,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=249, Invalid=1391, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:47:12,111 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 201 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:12,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 712 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1784 Invalid, 0 Unknown, 200 Unchecked, 0.7s Time] [2022-01-18 15:47:12,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4634 states. [2022-01-18 15:47:12,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4634 to 3992. [2022-01-18 15:47:12,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3992 states, 3991 states have (on average 4.2723628163367575) internal successors, (17051), 3991 states have internal predecessors, (17051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:12,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3992 states to 3992 states and 17051 transitions. [2022-01-18 15:47:12,178 INFO L78 Accepts]: Start accepts. Automaton has 3992 states and 17051 transitions. Word has length 23 [2022-01-18 15:47:12,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:12,179 INFO L470 AbstractCegarLoop]: Abstraction has 3992 states and 17051 transitions. [2022-01-18 15:47:12,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:12,179 INFO L276 IsEmpty]: Start isEmpty. Operand 3992 states and 17051 transitions. [2022-01-18 15:47:12,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:47:12,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:12,185 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:12,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-01-18 15:47:12,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-01-18 15:47:12,386 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:47:12,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:12,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1566904592, now seen corresponding path program 44 times [2022-01-18 15:47:12,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:12,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689315060] [2022-01-18 15:47:12,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:12,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:12,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:12,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:12,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:12,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689315060] [2022-01-18 15:47:12,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689315060] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:12,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099636912] [2022-01-18 15:47:12,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:47:12,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:12,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:12,573 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:12,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-01-18 15:47:12,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:47:12,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:12,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:47:12,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:12,766 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:12,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 52 [2022-01-18 15:47:12,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:12,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:13,063 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:13,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:47:13,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:13,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:47:13,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:13,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099636912] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:13,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:13,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:47:13,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349656235] [2022-01-18 15:47:13,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:13,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:47:13,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:13,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:47:13,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:47:13,119 INFO L87 Difference]: Start difference. First operand 3992 states and 17051 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:16,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:16,406 INFO L93 Difference]: Finished difference Result 4475 states and 18911 transitions. [2022-01-18 15:47:16,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:47:16,406 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:47:16,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:16,416 INFO L225 Difference]: With dead ends: 4475 [2022-01-18 15:47:16,416 INFO L226 Difference]: Without dead ends: 4449 [2022-01-18 15:47:16,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 10 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=259, Invalid=1298, Unknown=3, NotChecked=0, Total=1560 [2022-01-18 15:47:16,417 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 211 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 325 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:16,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 471 Invalid, 1378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 965 Invalid, 0 Unknown, 325 Unchecked, 0.4s Time] [2022-01-18 15:47:16,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4449 states. [2022-01-18 15:47:16,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4449 to 4000. [2022-01-18 15:47:16,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4000 states, 3999 states have (on average 4.273318329582396) internal successors, (17089), 3999 states have internal predecessors, (17089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:16,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4000 states to 4000 states and 17089 transitions. [2022-01-18 15:47:16,479 INFO L78 Accepts]: Start accepts. Automaton has 4000 states and 17089 transitions. Word has length 23 [2022-01-18 15:47:16,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:16,479 INFO L470 AbstractCegarLoop]: Abstraction has 4000 states and 17089 transitions. [2022-01-18 15:47:16,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:16,479 INFO L276 IsEmpty]: Start isEmpty. Operand 4000 states and 17089 transitions. [2022-01-18 15:47:16,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:47:16,485 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:16,485 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:16,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-01-18 15:47:16,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2022-01-18 15:47:16,686 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:47:16,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:16,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1114495970, now seen corresponding path program 45 times [2022-01-18 15:47:16,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:16,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179400235] [2022-01-18 15:47:16,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:16,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:16,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:16,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:16,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:16,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179400235] [2022-01-18 15:47:16,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179400235] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:16,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823599843] [2022-01-18 15:47:16,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:47:16,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:16,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:16,887 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:16,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-01-18 15:47:16,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:47:16,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:16,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:47:16,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:17,048 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:17,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:47:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:17,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:17,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:17,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:47:17,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:17,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:47:17,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:17,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823599843] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:17,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:17,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:47:17,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079686562] [2022-01-18 15:47:17,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:17,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:47:17,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:17,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:47:17,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:47:17,661 INFO L87 Difference]: Start difference. First operand 4000 states and 17089 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:19,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:19,004 INFO L93 Difference]: Finished difference Result 4587 states and 19358 transitions. [2022-01-18 15:47:19,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:47:19,005 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:47:19,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:19,017 INFO L225 Difference]: With dead ends: 4587 [2022-01-18 15:47:19,017 INFO L226 Difference]: Without dead ends: 4566 [2022-01-18 15:47:19,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=289, Invalid=1351, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:47:19,018 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 197 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 1654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:19,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 611 Invalid, 1654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1483 Invalid, 0 Unknown, 99 Unchecked, 0.7s Time] [2022-01-18 15:47:19,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4566 states. [2022-01-18 15:47:19,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4566 to 4000. [2022-01-18 15:47:19,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4000 states, 3999 states have (on average 4.272818204551138) internal successors, (17087), 3999 states have internal predecessors, (17087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:19,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4000 states to 4000 states and 17087 transitions. [2022-01-18 15:47:19,109 INFO L78 Accepts]: Start accepts. Automaton has 4000 states and 17087 transitions. Word has length 23 [2022-01-18 15:47:19,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:19,109 INFO L470 AbstractCegarLoop]: Abstraction has 4000 states and 17087 transitions. [2022-01-18 15:47:19,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:19,109 INFO L276 IsEmpty]: Start isEmpty. Operand 4000 states and 17087 transitions. [2022-01-18 15:47:19,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:47:19,118 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:19,118 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:19,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-01-18 15:47:19,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-01-18 15:47:19,333 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:47:19,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:19,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1331068018, now seen corresponding path program 46 times [2022-01-18 15:47:19,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:19,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607793357] [2022-01-18 15:47:19,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:19,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:19,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:19,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:19,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:19,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607793357] [2022-01-18 15:47:19,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607793357] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:19,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160348840] [2022-01-18 15:47:19,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:47:19,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:19,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:19,546 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:19,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-01-18 15:47:19,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:47:19,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:19,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:47:19,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:19,729 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:19,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:47:20,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:20,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:20,201 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:20,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:47:20,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:20,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:47:20,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:20,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160348840] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:20,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:20,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:47:20,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571101771] [2022-01-18 15:47:20,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:20,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:47:20,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:20,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:47:20,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:47:20,256 INFO L87 Difference]: Start difference. First operand 4000 states and 17087 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:21,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:21,301 INFO L93 Difference]: Finished difference Result 4713 states and 19847 transitions. [2022-01-18 15:47:21,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:47:21,301 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:47:21,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:21,313 INFO L225 Difference]: With dead ends: 4713 [2022-01-18 15:47:21,314 INFO L226 Difference]: Without dead ends: 4678 [2022-01-18 15:47:21,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=278, Invalid=1528, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 15:47:21,314 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 239 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 1407 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:21,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 543 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1407 Invalid, 0 Unknown, 124 Unchecked, 0.6s Time] [2022-01-18 15:47:21,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4678 states. [2022-01-18 15:47:21,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4678 to 4008. [2022-01-18 15:47:21,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4008 states, 4007 states have (on average 4.272772647866234) internal successors, (17121), 4007 states have internal predecessors, (17121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:21,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4008 states to 4008 states and 17121 transitions. [2022-01-18 15:47:21,426 INFO L78 Accepts]: Start accepts. Automaton has 4008 states and 17121 transitions. Word has length 23 [2022-01-18 15:47:21,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:21,426 INFO L470 AbstractCegarLoop]: Abstraction has 4008 states and 17121 transitions. [2022-01-18 15:47:21,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:21,426 INFO L276 IsEmpty]: Start isEmpty. Operand 4008 states and 17121 transitions. [2022-01-18 15:47:21,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:47:21,435 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:21,435 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:21,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-01-18 15:47:21,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-01-18 15:47:21,656 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:47:21,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:21,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1412467074, now seen corresponding path program 47 times [2022-01-18 15:47:21,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:21,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797105872] [2022-01-18 15:47:21,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:21,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:21,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:21,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:21,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797105872] [2022-01-18 15:47:21,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797105872] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:21,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922515368] [2022-01-18 15:47:21,879 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:47:21,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:21,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:21,882 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:21,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-01-18 15:47:21,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:47:21,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:21,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:47:21,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:22,092 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:22,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:47:22,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:22,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:22,598 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:22,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:47:22,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:22,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:47:22,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:22,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922515368] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:22,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:22,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:47:22,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346448156] [2022-01-18 15:47:22,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:22,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:47:22,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:22,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:47:22,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:47:22,654 INFO L87 Difference]: Start difference. First operand 4008 states and 17121 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:24,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:24,049 INFO L93 Difference]: Finished difference Result 4612 states and 19460 transitions. [2022-01-18 15:47:24,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 15:47:24,049 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:47:24,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:24,060 INFO L225 Difference]: With dead ends: 4612 [2022-01-18 15:47:24,060 INFO L226 Difference]: Without dead ends: 4586 [2022-01-18 15:47:24,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=320, Invalid=1572, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 15:47:24,060 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 277 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 1838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:24,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 557 Invalid, 1838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1514 Invalid, 0 Unknown, 224 Unchecked, 0.7s Time] [2022-01-18 15:47:24,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4586 states. [2022-01-18 15:47:24,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4586 to 4000. [2022-01-18 15:47:24,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4000 states, 3999 states have (on average 4.272818204551138) internal successors, (17087), 3999 states have internal predecessors, (17087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:24,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4000 states to 4000 states and 17087 transitions. [2022-01-18 15:47:24,123 INFO L78 Accepts]: Start accepts. Automaton has 4000 states and 17087 transitions. Word has length 23 [2022-01-18 15:47:24,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:24,123 INFO L470 AbstractCegarLoop]: Abstraction has 4000 states and 17087 transitions. [2022-01-18 15:47:24,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:24,123 INFO L276 IsEmpty]: Start isEmpty. Operand 4000 states and 17087 transitions. [2022-01-18 15:47:24,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:47:24,130 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:24,130 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:24,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-01-18 15:47:24,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:24,330 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:47:24,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:24,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1268933488, now seen corresponding path program 48 times [2022-01-18 15:47:24,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:24,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514065341] [2022-01-18 15:47:24,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:24,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:24,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:24,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:24,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:24,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514065341] [2022-01-18 15:47:24,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514065341] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:24,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117125842] [2022-01-18 15:47:24,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:47:24,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:24,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:24,644 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:24,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-01-18 15:47:24,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:47:24,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:24,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 15:47:24,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:24,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:24,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:24,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:24,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-01-18 15:47:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:25,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:25,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 15:47:25,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117125842] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:25,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:25,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-01-18 15:47:25,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309433060] [2022-01-18 15:47:25,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:25,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:47:25,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:25,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:47:25,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:47:25,352 INFO L87 Difference]: Start difference. First operand 4000 states and 17087 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:27,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:27,060 INFO L93 Difference]: Finished difference Result 6224 states and 26024 transitions. [2022-01-18 15:47:27,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 15:47:27,060 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:47:27,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:27,075 INFO L225 Difference]: With dead ends: 6224 [2022-01-18 15:47:27,075 INFO L226 Difference]: Without dead ends: 6173 [2022-01-18 15:47:27,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=514, Invalid=2036, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 15:47:27,076 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 306 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:27,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 499 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 984 Invalid, 0 Unknown, 110 Unchecked, 0.5s Time] [2022-01-18 15:47:27,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6173 states. [2022-01-18 15:47:27,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6173 to 4297. [2022-01-18 15:47:27,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4297 states, 4296 states have (on average 4.2893389199255125) internal successors, (18427), 4296 states have internal predecessors, (18427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:27,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4297 states to 4297 states and 18427 transitions. [2022-01-18 15:47:27,153 INFO L78 Accepts]: Start accepts. Automaton has 4297 states and 18427 transitions. Word has length 23 [2022-01-18 15:47:27,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:27,153 INFO L470 AbstractCegarLoop]: Abstraction has 4297 states and 18427 transitions. [2022-01-18 15:47:27,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:27,153 INFO L276 IsEmpty]: Start isEmpty. Operand 4297 states and 18427 transitions. [2022-01-18 15:47:27,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:47:27,160 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:27,160 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:27,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-01-18 15:47:27,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:27,360 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:47:27,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:27,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1132683500, now seen corresponding path program 49 times [2022-01-18 15:47:27,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:27,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883143506] [2022-01-18 15:47:27,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:27,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:27,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:27,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883143506] [2022-01-18 15:47:27,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883143506] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:27,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365554210] [2022-01-18 15:47:27,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:47:27,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:27,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:27,523 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:27,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-01-18 15:47:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:27,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:47:27,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:27,716 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:27,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:47:28,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:28,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:28,210 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:28,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:47:28,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:28,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:47:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:28,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365554210] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:28,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:28,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:47:28,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529817001] [2022-01-18 15:47:28,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:28,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:47:28,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:28,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:47:28,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:47:28,263 INFO L87 Difference]: Start difference. First operand 4297 states and 18427 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:29,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:29,334 INFO L93 Difference]: Finished difference Result 4789 states and 20318 transitions. [2022-01-18 15:47:29,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:47:29,334 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:47:29,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:29,345 INFO L225 Difference]: With dead ends: 4789 [2022-01-18 15:47:29,345 INFO L226 Difference]: Without dead ends: 4767 [2022-01-18 15:47:29,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=218, Invalid=1422, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:47:29,346 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 173 mSDsluCounter, 1029 mSDsCounter, 0 mSdLazyCounter, 1740 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 1863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:29,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 692 Invalid, 1863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1740 Invalid, 0 Unknown, 57 Unchecked, 0.7s Time] [2022-01-18 15:47:29,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4767 states. [2022-01-18 15:47:29,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4767 to 4303. [2022-01-18 15:47:29,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4303 states, 4302 states have (on average 4.289632728963273) internal successors, (18454), 4302 states have internal predecessors, (18454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:29,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4303 states to 4303 states and 18454 transitions. [2022-01-18 15:47:29,413 INFO L78 Accepts]: Start accepts. Automaton has 4303 states and 18454 transitions. Word has length 23 [2022-01-18 15:47:29,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:29,413 INFO L470 AbstractCegarLoop]: Abstraction has 4303 states and 18454 transitions. [2022-01-18 15:47:29,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:29,413 INFO L276 IsEmpty]: Start isEmpty. Operand 4303 states and 18454 transitions. [2022-01-18 15:47:29,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:47:29,423 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:29,423 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:29,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-01-18 15:47:29,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:29,631 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:47:29,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:29,632 INFO L85 PathProgramCache]: Analyzing trace with hash -547349548, now seen corresponding path program 50 times [2022-01-18 15:47:29,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:29,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724760789] [2022-01-18 15:47:29,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:29,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:29,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:29,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:29,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:29,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724760789] [2022-01-18 15:47:29,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724760789] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:29,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938291247] [2022-01-18 15:47:29,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:47:29,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:29,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:29,803 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:29,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-01-18 15:47:29,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:47:29,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:29,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:47:29,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:29,974 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:29,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:47:30,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:30,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:30,518 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:30,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:47:30,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:30,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:47:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:30,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938291247] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:30,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:30,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:47:30,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052866223] [2022-01-18 15:47:30,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:30,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:47:30,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:30,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:47:30,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:47:30,574 INFO L87 Difference]: Start difference. First operand 4303 states and 18454 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:31,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:31,840 INFO L93 Difference]: Finished difference Result 4754 states and 20187 transitions. [2022-01-18 15:47:31,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 15:47:31,840 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:47:31,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:31,851 INFO L225 Difference]: With dead ends: 4754 [2022-01-18 15:47:31,851 INFO L226 Difference]: Without dead ends: 4728 [2022-01-18 15:47:31,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=316, Invalid=1754, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 15:47:31,851 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 177 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 1430 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:31,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 564 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1430 Invalid, 0 Unknown, 99 Unchecked, 0.6s Time] [2022-01-18 15:47:31,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4728 states. [2022-01-18 15:47:31,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4728 to 4303. [2022-01-18 15:47:31,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4303 states, 4302 states have (on average 4.289632728963273) internal successors, (18454), 4302 states have internal predecessors, (18454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:31,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4303 states to 4303 states and 18454 transitions. [2022-01-18 15:47:31,918 INFO L78 Accepts]: Start accepts. Automaton has 4303 states and 18454 transitions. Word has length 23 [2022-01-18 15:47:31,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:31,918 INFO L470 AbstractCegarLoop]: Abstraction has 4303 states and 18454 transitions. [2022-01-18 15:47:31,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:31,919 INFO L276 IsEmpty]: Start isEmpty. Operand 4303 states and 18454 transitions. [2022-01-18 15:47:31,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:47:31,925 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:31,925 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:31,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-01-18 15:47:32,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:32,126 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:47:32,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:32,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1066217186, now seen corresponding path program 51 times [2022-01-18 15:47:32,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:32,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019856631] [2022-01-18 15:47:32,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:32,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:32,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:32,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:32,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019856631] [2022-01-18 15:47:32,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019856631] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:32,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972650281] [2022-01-18 15:47:32,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:47:32,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:32,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:32,302 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:32,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-01-18 15:47:32,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:47:32,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:32,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:47:32,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:32,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:32,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:47:33,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:33,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:33,294 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:33,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:47:33,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:33,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:47:33,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:33,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972650281] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:33,347 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:33,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:47:33,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845805009] [2022-01-18 15:47:33,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:33,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:47:33,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:33,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:47:33,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:47:33,347 INFO L87 Difference]: Start difference. First operand 4303 states and 18454 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:34,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:34,544 INFO L93 Difference]: Finished difference Result 4749 states and 20163 transitions. [2022-01-18 15:47:34,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:47:34,544 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:47:34,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:34,554 INFO L225 Difference]: With dead ends: 4749 [2022-01-18 15:47:34,555 INFO L226 Difference]: Without dead ends: 4728 [2022-01-18 15:47:34,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=265, Invalid=1457, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:47:34,555 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 178 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 1552 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 1751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:34,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 566 Invalid, 1751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1552 Invalid, 0 Unknown, 106 Unchecked, 0.6s Time] [2022-01-18 15:47:34,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4728 states. [2022-01-18 15:47:34,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4728 to 4299. [2022-01-18 15:47:34,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4299 states, 4298 states have (on average 4.2894369474174034) internal successors, (18436), 4298 states have internal predecessors, (18436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:34,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4299 states to 4299 states and 18436 transitions. [2022-01-18 15:47:34,619 INFO L78 Accepts]: Start accepts. Automaton has 4299 states and 18436 transitions. Word has length 23 [2022-01-18 15:47:34,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:34,619 INFO L470 AbstractCegarLoop]: Abstraction has 4299 states and 18436 transitions. [2022-01-18 15:47:34,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:34,620 INFO L276 IsEmpty]: Start isEmpty. Operand 4299 states and 18436 transitions. [2022-01-18 15:47:34,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:47:34,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:34,626 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:34,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-01-18 15:47:34,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-01-18 15:47:34,827 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:47:34,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:34,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1359904880, now seen corresponding path program 52 times [2022-01-18 15:47:34,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:34,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777966587] [2022-01-18 15:47:34,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:34,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:34,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:34,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:34,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:34,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777966587] [2022-01-18 15:47:34,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777966587] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:34,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027928896] [2022-01-18 15:47:34,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:47:34,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:34,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:34,987 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:34,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-01-18 15:47:35,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:47:35,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:35,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:47:35,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:35,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:35,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2022-01-18 15:47:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:35,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:35,657 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:35,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:47:35,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:35,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:47:35,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:35,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027928896] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:35,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:35,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:47:35,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718754556] [2022-01-18 15:47:35,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:35,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:47:35,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:35,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:47:35,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:47:35,711 INFO L87 Difference]: Start difference. First operand 4299 states and 18436 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:36,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:36,568 INFO L93 Difference]: Finished difference Result 4611 states and 19625 transitions. [2022-01-18 15:47:36,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:47:36,568 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:47:36,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:36,578 INFO L225 Difference]: With dead ends: 4611 [2022-01-18 15:47:36,578 INFO L226 Difference]: Without dead ends: 4589 [2022-01-18 15:47:36,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:47:36,579 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 157 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 1529 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 1735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:36,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 614 Invalid, 1735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1529 Invalid, 0 Unknown, 157 Unchecked, 0.6s Time] [2022-01-18 15:47:36,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4589 states. [2022-01-18 15:47:36,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4589 to 4303. [2022-01-18 15:47:36,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4303 states, 4302 states have (on average 4.289632728963273) internal successors, (18454), 4302 states have internal predecessors, (18454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:36,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4303 states to 4303 states and 18454 transitions. [2022-01-18 15:47:36,685 INFO L78 Accepts]: Start accepts. Automaton has 4303 states and 18454 transitions. Word has length 23 [2022-01-18 15:47:36,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:36,685 INFO L470 AbstractCegarLoop]: Abstraction has 4303 states and 18454 transitions. [2022-01-18 15:47:36,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:36,685 INFO L276 IsEmpty]: Start isEmpty. Operand 4303 states and 18454 transitions. [2022-01-18 15:47:36,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:47:36,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:36,692 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:36,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-01-18 15:47:36,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:36,893 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:47:36,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:36,893 INFO L85 PathProgramCache]: Analyzing trace with hash -846378028, now seen corresponding path program 53 times [2022-01-18 15:47:36,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:36,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716305230] [2022-01-18 15:47:36,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:36,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:36,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:37,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:37,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:37,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716305230] [2022-01-18 15:47:37,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716305230] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:37,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100110776] [2022-01-18 15:47:37,093 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:47:37,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:37,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:37,094 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:37,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-01-18 15:47:37,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:47:37,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:37,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:47:37,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:37,261 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:37,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:47:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:37,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:37,847 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:37,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:47:37,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:37,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:47:37,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:37,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100110776] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:37,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:37,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:47:37,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706963576] [2022-01-18 15:47:37,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:37,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:47:37,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:37,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:47:37,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:47:37,897 INFO L87 Difference]: Start difference. First operand 4303 states and 18454 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:38,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:38,719 INFO L93 Difference]: Finished difference Result 4596 states and 19561 transitions. [2022-01-18 15:47:38,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:47:38,719 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:47:38,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:38,730 INFO L225 Difference]: With dead ends: 4596 [2022-01-18 15:47:38,730 INFO L226 Difference]: Without dead ends: 4571 [2022-01-18 15:47:38,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=191, Invalid=1141, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:47:38,730 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 157 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:38,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 495 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1253 Invalid, 0 Unknown, 99 Unchecked, 0.5s Time] [2022-01-18 15:47:38,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4571 states. [2022-01-18 15:47:38,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4571 to 4307. [2022-01-18 15:47:38,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4307 states, 4306 states have (on average 4.289363678588017) internal successors, (18470), 4306 states have internal predecessors, (18470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:38,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4307 states to 4307 states and 18470 transitions. [2022-01-18 15:47:38,797 INFO L78 Accepts]: Start accepts. Automaton has 4307 states and 18470 transitions. Word has length 23 [2022-01-18 15:47:38,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:38,797 INFO L470 AbstractCegarLoop]: Abstraction has 4307 states and 18470 transitions. [2022-01-18 15:47:38,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:38,797 INFO L276 IsEmpty]: Start isEmpty. Operand 4307 states and 18470 transitions. [2022-01-18 15:47:38,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:47:38,804 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:38,804 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:38,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-01-18 15:47:39,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-01-18 15:47:39,004 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:47:39,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:39,004 INFO L85 PathProgramCache]: Analyzing trace with hash 229333128, now seen corresponding path program 54 times [2022-01-18 15:47:39,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:39,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934247484] [2022-01-18 15:47:39,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:39,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:39,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:39,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:39,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:39,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934247484] [2022-01-18 15:47:39,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934247484] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:39,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095017657] [2022-01-18 15:47:39,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:47:39,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:39,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:39,165 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:39,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-01-18 15:47:39,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:47:39,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:39,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:47:39,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:39,363 INFO L353 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2022-01-18 15:47:39,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 47 [2022-01-18 15:47:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:39,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:39,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:39,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095017657] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:39,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:39,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-01-18 15:47:39,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988463552] [2022-01-18 15:47:39,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:39,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:47:39,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:39,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:47:39,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:47:39,730 INFO L87 Difference]: Start difference. First operand 4307 states and 18470 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:41,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:41,068 INFO L93 Difference]: Finished difference Result 5245 states and 22114 transitions. [2022-01-18 15:47:41,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 15:47:41,069 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:47:41,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:41,082 INFO L225 Difference]: With dead ends: 5245 [2022-01-18 15:47:41,082 INFO L226 Difference]: Without dead ends: 5197 [2022-01-18 15:47:41,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=268, Invalid=1624, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 15:47:41,083 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 306 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 1585 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:41,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 533 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1585 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 15:47:41,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5197 states. [2022-01-18 15:47:41,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5197 to 4325. [2022-01-18 15:47:41,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4325 states, 4324 states have (on average 4.290703052728954) internal successors, (18553), 4324 states have internal predecessors, (18553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:41,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4325 states to 4325 states and 18553 transitions. [2022-01-18 15:47:41,155 INFO L78 Accepts]: Start accepts. Automaton has 4325 states and 18553 transitions. Word has length 23 [2022-01-18 15:47:41,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:41,155 INFO L470 AbstractCegarLoop]: Abstraction has 4325 states and 18553 transitions. [2022-01-18 15:47:41,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:41,156 INFO L276 IsEmpty]: Start isEmpty. Operand 4325 states and 18553 transitions. [2022-01-18 15:47:41,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:47:41,163 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:41,163 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:41,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-01-18 15:47:41,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-01-18 15:47:41,364 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:47:41,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:41,364 INFO L85 PathProgramCache]: Analyzing trace with hash 510328980, now seen corresponding path program 55 times [2022-01-18 15:47:41,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:41,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889392613] [2022-01-18 15:47:41,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:41,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:41,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:41,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:41,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:41,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889392613] [2022-01-18 15:47:41,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889392613] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:41,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471952408] [2022-01-18 15:47:41,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:47:41,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:41,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:41,541 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:41,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-01-18 15:47:41,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:41,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:47:41,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:41,693 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:41,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:47:44,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:44,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:44,281 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:44,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:47:44,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:44,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:47:44,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:44,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471952408] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:44,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:44,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:47:44,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868502479] [2022-01-18 15:47:44,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:44,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:47:44,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:44,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:47:44,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=563, Unknown=1, NotChecked=0, Total=650 [2022-01-18 15:47:44,334 INFO L87 Difference]: Start difference. First operand 4325 states and 18553 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:44,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:44,823 INFO L93 Difference]: Finished difference Result 4475 states and 19090 transitions. [2022-01-18 15:47:44,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:47:44,823 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:47:44,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:44,834 INFO L225 Difference]: With dead ends: 4475 [2022-01-18 15:47:44,835 INFO L226 Difference]: Without dead ends: 4449 [2022-01-18 15:47:44,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=122, Invalid=747, Unknown=1, NotChecked=0, Total=870 [2022-01-18 15:47:44,835 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 159 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:44,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 339 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 771 Invalid, 0 Unknown, 62 Unchecked, 0.3s Time] [2022-01-18 15:47:44,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4449 states. [2022-01-18 15:47:44,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4449 to 4334. [2022-01-18 15:47:44,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4334 states, 4333 states have (on average 4.289176090468498) internal successors, (18585), 4333 states have internal predecessors, (18585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:44,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4334 states to 4334 states and 18585 transitions. [2022-01-18 15:47:44,901 INFO L78 Accepts]: Start accepts. Automaton has 4334 states and 18585 transitions. Word has length 23 [2022-01-18 15:47:44,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:44,901 INFO L470 AbstractCegarLoop]: Abstraction has 4334 states and 18585 transitions. [2022-01-18 15:47:44,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:44,901 INFO L276 IsEmpty]: Start isEmpty. Operand 4334 states and 18585 transitions. [2022-01-18 15:47:44,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:47:44,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:44,908 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:44,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-01-18 15:47:45,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:45,109 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:47:45,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:45,109 INFO L85 PathProgramCache]: Analyzing trace with hash -531247088, now seen corresponding path program 56 times [2022-01-18 15:47:45,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:45,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758494593] [2022-01-18 15:47:45,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:45,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:45,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:45,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:45,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758494593] [2022-01-18 15:47:45,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758494593] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:45,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792571944] [2022-01-18 15:47:45,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:47:45,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:45,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:45,284 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:45,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-01-18 15:47:45,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:47:45,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:45,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:47:45,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:45,434 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:45,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:47:45,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:45,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:46,089 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:46,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:47:46,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:46,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:47:46,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:46,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792571944] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:46,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:46,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:47:46,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651028237] [2022-01-18 15:47:46,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:46,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:47:46,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:46,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:47:46,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:47:46,144 INFO L87 Difference]: Start difference. First operand 4334 states and 18585 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:47,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:47,072 INFO L93 Difference]: Finished difference Result 4732 states and 20106 transitions. [2022-01-18 15:47:47,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:47:47,073 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:47:47,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:47,083 INFO L225 Difference]: With dead ends: 4732 [2022-01-18 15:47:47,083 INFO L226 Difference]: Without dead ends: 4704 [2022-01-18 15:47:47,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=206, Invalid=1054, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:47:47,084 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 172 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 1430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:47,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 462 Invalid, 1430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1274 Invalid, 0 Unknown, 61 Unchecked, 0.5s Time] [2022-01-18 15:47:47,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4704 states. [2022-01-18 15:47:47,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4704 to 4331. [2022-01-18 15:47:47,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4331 states, 4330 states have (on average 4.290300230946882) internal successors, (18577), 4330 states have internal predecessors, (18577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:47,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4331 states to 4331 states and 18577 transitions. [2022-01-18 15:47:47,182 INFO L78 Accepts]: Start accepts. Automaton has 4331 states and 18577 transitions. Word has length 23 [2022-01-18 15:47:47,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:47,182 INFO L470 AbstractCegarLoop]: Abstraction has 4331 states and 18577 transitions. [2022-01-18 15:47:47,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:47,182 INFO L276 IsEmpty]: Start isEmpty. Operand 4331 states and 18577 transitions. [2022-01-18 15:47:47,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:47:47,189 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:47,189 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:47,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-01-18 15:47:47,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2022-01-18 15:47:47,390 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:47:47,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:47,390 INFO L85 PathProgramCache]: Analyzing trace with hash -818368440, now seen corresponding path program 57 times [2022-01-18 15:47:47,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:47,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909115422] [2022-01-18 15:47:47,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:47,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:47,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:47,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:47,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909115422] [2022-01-18 15:47:47,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909115422] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:47,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379417908] [2022-01-18 15:47:47,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:47:47,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:47,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:47,574 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:47,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-01-18 15:47:47,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:47:47,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:47,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:47:47,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:47,770 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:47,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:47:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:48,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:48,472 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:48,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:47:48,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:48,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:47:48,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:48,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379417908] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:48,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:48,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:47:48,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029565811] [2022-01-18 15:47:48,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:48,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:47:48,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:48,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:47:48,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:47:48,546 INFO L87 Difference]: Start difference. First operand 4331 states and 18577 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:49,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:49,442 INFO L93 Difference]: Finished difference Result 4715 states and 20043 transitions. [2022-01-18 15:47:49,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:47:49,442 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:47:49,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:49,453 INFO L225 Difference]: With dead ends: 4715 [2022-01-18 15:47:49,453 INFO L226 Difference]: Without dead ends: 4689 [2022-01-18 15:47:49,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:47:49,453 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 202 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:49,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 417 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1028 Invalid, 0 Unknown, 154 Unchecked, 0.4s Time] [2022-01-18 15:47:49,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4689 states. [2022-01-18 15:47:49,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4689 to 4331. [2022-01-18 15:47:49,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4331 states, 4330 states have (on average 4.290300230946882) internal successors, (18577), 4330 states have internal predecessors, (18577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:49,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4331 states to 4331 states and 18577 transitions. [2022-01-18 15:47:49,520 INFO L78 Accepts]: Start accepts. Automaton has 4331 states and 18577 transitions. Word has length 23 [2022-01-18 15:47:49,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:49,520 INFO L470 AbstractCegarLoop]: Abstraction has 4331 states and 18577 transitions. [2022-01-18 15:47:49,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:49,520 INFO L276 IsEmpty]: Start isEmpty. Operand 4331 states and 18577 transitions. [2022-01-18 15:47:49,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:47:49,527 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:49,527 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:49,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-01-18 15:47:49,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:49,727 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:47:49,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:49,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1311585826, now seen corresponding path program 58 times [2022-01-18 15:47:49,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:49,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654757842] [2022-01-18 15:47:49,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:49,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:49,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:49,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:49,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:49,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654757842] [2022-01-18 15:47:49,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654757842] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:49,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42481318] [2022-01-18 15:47:49,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:47:49,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:49,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:49,978 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:49,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-01-18 15:47:50,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:47:50,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:50,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:47:50,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:50,167 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:50,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:47:50,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:50,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:50,808 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:50,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:47:50,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:50,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:47:50,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:50,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42481318] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:50,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:50,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:47:50,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986857155] [2022-01-18 15:47:50,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:50,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:47:50,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:50,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:47:50,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:47:50,862 INFO L87 Difference]: Start difference. First operand 4331 states and 18577 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:51,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:51,812 INFO L93 Difference]: Finished difference Result 4717 states and 20051 transitions. [2022-01-18 15:47:51,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:47:51,812 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:47:51,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:51,824 INFO L225 Difference]: With dead ends: 4717 [2022-01-18 15:47:51,824 INFO L226 Difference]: Without dead ends: 4696 [2022-01-18 15:47:51,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=219, Invalid=1187, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:47:51,825 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 172 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:51,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 452 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1237 Invalid, 0 Unknown, 60 Unchecked, 0.5s Time] [2022-01-18 15:47:51,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4696 states. [2022-01-18 15:47:51,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4696 to 4331. [2022-01-18 15:47:51,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4331 states, 4330 states have (on average 4.290300230946882) internal successors, (18577), 4330 states have internal predecessors, (18577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:51,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4331 states to 4331 states and 18577 transitions. [2022-01-18 15:47:51,899 INFO L78 Accepts]: Start accepts. Automaton has 4331 states and 18577 transitions. Word has length 23 [2022-01-18 15:47:51,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:51,900 INFO L470 AbstractCegarLoop]: Abstraction has 4331 states and 18577 transitions. [2022-01-18 15:47:51,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:51,900 INFO L276 IsEmpty]: Start isEmpty. Operand 4331 states and 18577 transitions. [2022-01-18 15:47:51,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:47:51,906 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:51,906 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:51,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-01-18 15:47:52,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:52,107 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:47:52,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:52,107 INFO L85 PathProgramCache]: Analyzing trace with hash -376809570, now seen corresponding path program 59 times [2022-01-18 15:47:52,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:52,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122486339] [2022-01-18 15:47:52,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:52,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:52,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:52,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:52,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:52,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122486339] [2022-01-18 15:47:52,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122486339] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:52,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729718335] [2022-01-18 15:47:52,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:47:52,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:52,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:52,278 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:52,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-01-18 15:47:52,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:47:52,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:52,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:47:52,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:52,429 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:52,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2022-01-18 15:47:52,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:52,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:52,753 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:52,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:47:52,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:52,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:47:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:52,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729718335] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:52,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:52,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:47:52,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977011016] [2022-01-18 15:47:52,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:52,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:47:52,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:52,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:47:52,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:47:52,804 INFO L87 Difference]: Start difference. First operand 4331 states and 18577 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:53,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:53,586 INFO L93 Difference]: Finished difference Result 4661 states and 19833 transitions. [2022-01-18 15:47:53,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:47:53,586 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:47:53,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:53,597 INFO L225 Difference]: With dead ends: 4661 [2022-01-18 15:47:53,597 INFO L226 Difference]: Without dead ends: 4636 [2022-01-18 15:47:53,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:47:53,597 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 115 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:53,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 365 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:47:53,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4636 states. [2022-01-18 15:47:53,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4636 to 4335. [2022-01-18 15:47:53,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4335 states, 4334 states have (on average 4.290032302722658) internal successors, (18593), 4334 states have internal predecessors, (18593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:53,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4335 states to 4335 states and 18593 transitions. [2022-01-18 15:47:53,663 INFO L78 Accepts]: Start accepts. Automaton has 4335 states and 18593 transitions. Word has length 23 [2022-01-18 15:47:53,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:53,663 INFO L470 AbstractCegarLoop]: Abstraction has 4335 states and 18593 transitions. [2022-01-18 15:47:53,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:53,663 INFO L276 IsEmpty]: Start isEmpty. Operand 4335 states and 18593 transitions. [2022-01-18 15:47:53,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:47:53,670 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:53,670 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:53,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2022-01-18 15:47:53,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:53,870 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:47:53,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:53,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1389502102, now seen corresponding path program 60 times [2022-01-18 15:47:53,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:53,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302463595] [2022-01-18 15:47:53,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:53,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:53,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:54,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:54,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:54,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302463595] [2022-01-18 15:47:54,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302463595] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:54,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634676780] [2022-01-18 15:47:54,039 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:47:54,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:54,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:54,040 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:54,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-01-18 15:47:54,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:47:54,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:54,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:47:54,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:54,188 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:54,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:47:54,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:54,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:54,828 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:54,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:47:54,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:54,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:47:54,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:54,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634676780] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:54,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:54,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:47:54,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100121268] [2022-01-18 15:47:54,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:54,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:47:54,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:54,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:47:54,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:47:54,884 INFO L87 Difference]: Start difference. First operand 4335 states and 18593 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:55,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:55,527 INFO L93 Difference]: Finished difference Result 4669 states and 19861 transitions. [2022-01-18 15:47:55,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:47:55,528 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:47:55,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:55,538 INFO L225 Difference]: With dead ends: 4669 [2022-01-18 15:47:55,538 INFO L226 Difference]: Without dead ends: 4648 [2022-01-18 15:47:55,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:47:55,539 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 153 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:55,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 341 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 915 Invalid, 0 Unknown, 133 Unchecked, 0.4s Time] [2022-01-18 15:47:55,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4648 states. [2022-01-18 15:47:55,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4648 to 4331. [2022-01-18 15:47:55,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4331 states, 4330 states have (on average 4.290300230946882) internal successors, (18577), 4330 states have internal predecessors, (18577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:55,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4331 states to 4331 states and 18577 transitions. [2022-01-18 15:47:55,642 INFO L78 Accepts]: Start accepts. Automaton has 4331 states and 18577 transitions. Word has length 23 [2022-01-18 15:47:55,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:55,642 INFO L470 AbstractCegarLoop]: Abstraction has 4331 states and 18577 transitions. [2022-01-18 15:47:55,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:55,642 INFO L276 IsEmpty]: Start isEmpty. Operand 4331 states and 18577 transitions. [2022-01-18 15:47:55,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:47:55,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:55,649 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:55,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2022-01-18 15:47:55,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:55,861 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:47:55,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:55,861 INFO L85 PathProgramCache]: Analyzing trace with hash -240635982, now seen corresponding path program 61 times [2022-01-18 15:47:55,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:55,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314794565] [2022-01-18 15:47:55,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:55,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:55,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:56,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:56,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:56,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314794565] [2022-01-18 15:47:56,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314794565] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:56,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644364633] [2022-01-18 15:47:56,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:47:56,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:56,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:56,027 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:56,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-01-18 15:47:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:56,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:47:56,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:56,229 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:56,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:47:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:56,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:47:56,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:56,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:47:56,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:56,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:47:56,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:56,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644364633] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:47:56,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:47:56,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:47:56,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467229482] [2022-01-18 15:47:56,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:47:56,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:47:56,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:47:56,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:47:56,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:47:56,760 INFO L87 Difference]: Start difference. First operand 4331 states and 18577 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:57,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:47:57,531 INFO L93 Difference]: Finished difference Result 4708 states and 20006 transitions. [2022-01-18 15:47:57,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:47:57,531 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:47:57,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:47:57,542 INFO L225 Difference]: With dead ends: 4708 [2022-01-18 15:47:57,542 INFO L226 Difference]: Without dead ends: 4673 [2022-01-18 15:47:57,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:47:57,543 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 168 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 1561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:47:57,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 492 Invalid, 1561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1483 Invalid, 0 Unknown, 46 Unchecked, 0.6s Time] [2022-01-18 15:47:57,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4673 states. [2022-01-18 15:47:57,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4673 to 4331. [2022-01-18 15:47:57,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4331 states, 4330 states have (on average 4.289376443418014) internal successors, (18573), 4330 states have internal predecessors, (18573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:57,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4331 states to 4331 states and 18573 transitions. [2022-01-18 15:47:57,607 INFO L78 Accepts]: Start accepts. Automaton has 4331 states and 18573 transitions. Word has length 23 [2022-01-18 15:47:57,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:47:57,607 INFO L470 AbstractCegarLoop]: Abstraction has 4331 states and 18573 transitions. [2022-01-18 15:47:57,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:47:57,607 INFO L276 IsEmpty]: Start isEmpty. Operand 4331 states and 18573 transitions. [2022-01-18 15:47:57,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:47:57,615 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:47:57,615 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:47:57,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-01-18 15:47:57,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:57,815 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:47:57,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:47:57,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1504648054, now seen corresponding path program 62 times [2022-01-18 15:47:57,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:47:57,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109871261] [2022-01-18 15:47:57,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:47:57,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:47:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:47:57,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:47:57,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:47:57,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109871261] [2022-01-18 15:47:57,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109871261] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:47:57,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565560258] [2022-01-18 15:47:57,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:47:57,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:47:57,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:47:57,988 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:47:57,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-01-18 15:47:58,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:47:58,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:47:58,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 15:47:58,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:47:58,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:58,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:47:58,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:47:58,179 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:47:58,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 32 [2022-01-18 15:48:00,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:00,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:00,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:00,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:48:00,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:00,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:48:00,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:00,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565560258] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:00,760 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:00,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:48:00,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973510272] [2022-01-18 15:48:00,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:00,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:48:00,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:00,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:48:00,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=518, Unknown=1, NotChecked=0, Total=600 [2022-01-18 15:48:00,760 INFO L87 Difference]: Start difference. First operand 4331 states and 18573 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:02,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:02,194 INFO L93 Difference]: Finished difference Result 5095 states and 21511 transitions. [2022-01-18 15:48:02,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 15:48:02,194 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:48:02,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:02,206 INFO L225 Difference]: With dead ends: 5095 [2022-01-18 15:48:02,206 INFO L226 Difference]: Without dead ends: 5069 [2022-01-18 15:48:02,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=309, Invalid=1852, Unknown=1, NotChecked=0, Total=2162 [2022-01-18 15:48:02,206 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 236 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 1441 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 1659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:02,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 509 Invalid, 1659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1441 Invalid, 0 Unknown, 82 Unchecked, 0.7s Time] [2022-01-18 15:48:02,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5069 states. [2022-01-18 15:48:02,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5069 to 4338. [2022-01-18 15:48:02,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4338 states, 4337 states have (on average 4.287987087848744) internal successors, (18597), 4337 states have internal predecessors, (18597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:02,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4338 states to 4338 states and 18597 transitions. [2022-01-18 15:48:02,278 INFO L78 Accepts]: Start accepts. Automaton has 4338 states and 18597 transitions. Word has length 23 [2022-01-18 15:48:02,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:02,278 INFO L470 AbstractCegarLoop]: Abstraction has 4338 states and 18597 transitions. [2022-01-18 15:48:02,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:02,278 INFO L276 IsEmpty]: Start isEmpty. Operand 4338 states and 18597 transitions. [2022-01-18 15:48:02,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:48:02,285 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:02,285 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:02,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2022-01-18 15:48:02,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:02,487 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:48:02,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:02,487 INFO L85 PathProgramCache]: Analyzing trace with hash 463071986, now seen corresponding path program 63 times [2022-01-18 15:48:02,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:02,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114782763] [2022-01-18 15:48:02,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:02,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:02,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:02,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:02,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114782763] [2022-01-18 15:48:02,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114782763] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:02,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698574181] [2022-01-18 15:48:02,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:48:02,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:02,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:02,706 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:02,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-01-18 15:48:02,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:48:02,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:02,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:48:02,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:02,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:02,911 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-01-18 15:48:02,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 55 [2022-01-18 15:48:03,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:03,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:03,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:03,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698574181] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:03,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:03,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2022-01-18 15:48:03,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023748659] [2022-01-18 15:48:03,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:03,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:48:03,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:03,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:48:03,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:48:03,270 INFO L87 Difference]: Start difference. First operand 4338 states and 18597 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:04,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:04,920 INFO L93 Difference]: Finished difference Result 5437 states and 22846 transitions. [2022-01-18 15:48:04,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 15:48:04,920 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:48:04,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:04,933 INFO L225 Difference]: With dead ends: 5437 [2022-01-18 15:48:04,933 INFO L226 Difference]: Without dead ends: 5380 [2022-01-18 15:48:04,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=339, Invalid=2211, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 15:48:04,933 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 373 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 1961 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 2089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:04,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 573 Invalid, 2089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1961 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 15:48:04,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5380 states. [2022-01-18 15:48:04,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5380 to 4347. [2022-01-18 15:48:04,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4347 states, 4346 states have (on average 4.291302346985734) internal successors, (18650), 4346 states have internal predecessors, (18650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:05,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4347 states to 4347 states and 18650 transitions. [2022-01-18 15:48:05,007 INFO L78 Accepts]: Start accepts. Automaton has 4347 states and 18650 transitions. Word has length 23 [2022-01-18 15:48:05,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:05,007 INFO L470 AbstractCegarLoop]: Abstraction has 4347 states and 18650 transitions. [2022-01-18 15:48:05,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:05,007 INFO L276 IsEmpty]: Start isEmpty. Operand 4347 states and 18650 transitions. [2022-01-18 15:48:05,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:48:05,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:05,014 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:05,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2022-01-18 15:48:05,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-01-18 15:48:05,215 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:48:05,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:05,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1519416958, now seen corresponding path program 64 times [2022-01-18 15:48:05,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:05,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287823256] [2022-01-18 15:48:05,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:05,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:05,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:05,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:05,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:05,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287823256] [2022-01-18 15:48:05,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287823256] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:05,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112087368] [2022-01-18 15:48:05,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:48:05,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:05,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:05,411 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:05,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-01-18 15:48:05,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:48:05,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:05,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:48:05,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:05,604 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:05,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:48:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:05,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:06,089 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:06,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:48:06,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:06,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:48:06,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:06,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112087368] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:06,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:06,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:48:06,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002298328] [2022-01-18 15:48:06,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:06,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:48:06,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:06,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:48:06,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:48:06,144 INFO L87 Difference]: Start difference. First operand 4347 states and 18650 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:07,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:07,246 INFO L93 Difference]: Finished difference Result 4949 states and 20972 transitions. [2022-01-18 15:48:07,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 15:48:07,247 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:48:07,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:07,257 INFO L225 Difference]: With dead ends: 4949 [2022-01-18 15:48:07,258 INFO L226 Difference]: Without dead ends: 4914 [2022-01-18 15:48:07,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=255, Invalid=1637, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 15:48:07,258 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 281 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:07,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 548 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1491 Invalid, 0 Unknown, 92 Unchecked, 0.6s Time] [2022-01-18 15:48:07,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4914 states. [2022-01-18 15:48:07,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4914 to 4347. [2022-01-18 15:48:07,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4347 states, 4346 states have (on average 4.288080994017488) internal successors, (18636), 4346 states have internal predecessors, (18636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:07,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4347 states to 4347 states and 18636 transitions. [2022-01-18 15:48:07,328 INFO L78 Accepts]: Start accepts. Automaton has 4347 states and 18636 transitions. Word has length 23 [2022-01-18 15:48:07,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:07,328 INFO L470 AbstractCegarLoop]: Abstraction has 4347 states and 18636 transitions. [2022-01-18 15:48:07,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:07,328 INFO L276 IsEmpty]: Start isEmpty. Operand 4347 states and 18636 transitions. [2022-01-18 15:48:07,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:48:07,335 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:07,335 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:07,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2022-01-18 15:48:07,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-01-18 15:48:07,535 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:48:07,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:07,536 INFO L85 PathProgramCache]: Analyzing trace with hash 715017734, now seen corresponding path program 65 times [2022-01-18 15:48:07,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:07,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829394427] [2022-01-18 15:48:07,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:07,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:07,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:07,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:07,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829394427] [2022-01-18 15:48:07,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829394427] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:07,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121808208] [2022-01-18 15:48:07,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:48:07,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:07,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:07,704 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:07,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-01-18 15:48:07,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:48:07,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:07,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:48:07,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:07,873 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:07,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:48:08,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:08,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:08,376 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:08,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:48:08,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:08,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:48:08,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:08,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121808208] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:08,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:08,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:48:08,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530295744] [2022-01-18 15:48:08,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:08,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:48:08,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:08,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:48:08,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:48:08,428 INFO L87 Difference]: Start difference. First operand 4347 states and 18636 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:09,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:09,694 INFO L93 Difference]: Finished difference Result 4869 states and 20654 transitions. [2022-01-18 15:48:09,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 15:48:09,694 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:48:09,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:09,706 INFO L225 Difference]: With dead ends: 4869 [2022-01-18 15:48:09,706 INFO L226 Difference]: Without dead ends: 4843 [2022-01-18 15:48:09,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=293, Invalid=1687, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 15:48:09,706 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 252 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 1528 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 1821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:09,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 546 Invalid, 1821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1528 Invalid, 0 Unknown, 176 Unchecked, 0.6s Time] [2022-01-18 15:48:09,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4843 states. [2022-01-18 15:48:09,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4843 to 4347. [2022-01-18 15:48:09,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4347 states, 4346 states have (on average 4.288080994017488) internal successors, (18636), 4346 states have internal predecessors, (18636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:09,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4347 states to 4347 states and 18636 transitions. [2022-01-18 15:48:09,828 INFO L78 Accepts]: Start accepts. Automaton has 4347 states and 18636 transitions. Word has length 23 [2022-01-18 15:48:09,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:09,828 INFO L470 AbstractCegarLoop]: Abstraction has 4347 states and 18636 transitions. [2022-01-18 15:48:09,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:09,828 INFO L276 IsEmpty]: Start isEmpty. Operand 4347 states and 18636 transitions. [2022-01-18 15:48:09,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:48:09,837 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:09,837 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:09,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2022-01-18 15:48:10,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-01-18 15:48:10,051 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:48:10,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:10,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1966382828, now seen corresponding path program 66 times [2022-01-18 15:48:10,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:10,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025335020] [2022-01-18 15:48:10,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:10,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:10,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:10,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:10,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:10,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025335020] [2022-01-18 15:48:10,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025335020] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:10,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893191901] [2022-01-18 15:48:10,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:48:10,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:10,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:10,222 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:10,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-01-18 15:48:10,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:48:10,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:10,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:48:10,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:10,393 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:10,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:48:10,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:10,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:10,947 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:10,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:48:10,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:10,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:48:11,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:11,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893191901] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:11,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:11,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:48:11,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429631179] [2022-01-18 15:48:11,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:11,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:48:11,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:11,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:48:11,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:48:11,002 INFO L87 Difference]: Start difference. First operand 4347 states and 18636 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:12,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:12,218 INFO L93 Difference]: Finished difference Result 4876 states and 20673 transitions. [2022-01-18 15:48:12,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:48:12,219 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:48:12,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:12,230 INFO L225 Difference]: With dead ends: 4876 [2022-01-18 15:48:12,230 INFO L226 Difference]: Without dead ends: 4855 [2022-01-18 15:48:12,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=260, Invalid=1462, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:48:12,231 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 199 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 1712 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 1981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:12,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 596 Invalid, 1981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1712 Invalid, 0 Unknown, 179 Unchecked, 0.7s Time] [2022-01-18 15:48:12,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4855 states. [2022-01-18 15:48:12,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4855 to 4347. [2022-01-18 15:48:12,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4347 states, 4346 states have (on average 4.288080994017488) internal successors, (18636), 4346 states have internal predecessors, (18636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:12,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4347 states to 4347 states and 18636 transitions. [2022-01-18 15:48:12,339 INFO L78 Accepts]: Start accepts. Automaton has 4347 states and 18636 transitions. Word has length 23 [2022-01-18 15:48:12,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:12,340 INFO L470 AbstractCegarLoop]: Abstraction has 4347 states and 18636 transitions. [2022-01-18 15:48:12,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:12,340 INFO L276 IsEmpty]: Start isEmpty. Operand 4347 states and 18636 transitions. [2022-01-18 15:48:12,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:48:12,347 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:12,347 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:12,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2022-01-18 15:48:12,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:12,548 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:48:12,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:12,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1875237754, now seen corresponding path program 67 times [2022-01-18 15:48:12,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:12,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224338312] [2022-01-18 15:48:12,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:12,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:12,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:12,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:12,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224338312] [2022-01-18 15:48:12,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224338312] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:12,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198136512] [2022-01-18 15:48:12,727 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:48:12,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:12,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:12,728 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:12,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-01-18 15:48:12,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:12,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:48:12,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:12,878 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:12,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:48:13,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:13,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:13,894 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:13,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:48:13,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:13,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:48:13,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:13,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198136512] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:13,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:13,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:48:13,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492712543] [2022-01-18 15:48:13,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:13,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:48:13,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:13,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:48:13,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:48:13,948 INFO L87 Difference]: Start difference. First operand 4347 states and 18636 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:14,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:14,824 INFO L93 Difference]: Finished difference Result 4704 states and 20000 transitions. [2022-01-18 15:48:14,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:48:14,825 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:48:14,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:14,835 INFO L225 Difference]: With dead ends: 4704 [2022-01-18 15:48:14,836 INFO L226 Difference]: Without dead ends: 4678 [2022-01-18 15:48:14,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=177, Invalid=1013, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:48:14,836 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 158 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 1306 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:14,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 436 Invalid, 1478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1306 Invalid, 0 Unknown, 104 Unchecked, 0.5s Time] [2022-01-18 15:48:14,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4678 states. [2022-01-18 15:48:14,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4678 to 4356. [2022-01-18 15:48:14,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4356 states, 4355 states have (on average 4.286567164179105) internal successors, (18668), 4355 states have internal predecessors, (18668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:14,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4356 states to 4356 states and 18668 transitions. [2022-01-18 15:48:14,905 INFO L78 Accepts]: Start accepts. Automaton has 4356 states and 18668 transitions. Word has length 23 [2022-01-18 15:48:14,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:14,905 INFO L470 AbstractCegarLoop]: Abstraction has 4356 states and 18668 transitions. [2022-01-18 15:48:14,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:14,905 INFO L276 IsEmpty]: Start isEmpty. Operand 4356 states and 18668 transitions. [2022-01-18 15:48:14,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:48:14,912 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:14,912 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:14,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-01-18 15:48:15,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:15,112 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:48:15,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:15,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1378153474, now seen corresponding path program 68 times [2022-01-18 15:48:15,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:15,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798296556] [2022-01-18 15:48:15,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:15,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:15,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:15,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:15,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:15,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798296556] [2022-01-18 15:48:15,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798296556] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:15,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876483350] [2022-01-18 15:48:15,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:48:15,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:15,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:15,292 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:15,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-01-18 15:48:15,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:48:15,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:15,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:48:15,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:15,468 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:15,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:48:15,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:15,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:16,159 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:16,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:48:16,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:16,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:48:16,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:16,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876483350] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:16,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:16,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:48:16,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534248958] [2022-01-18 15:48:16,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:16,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:48:16,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:16,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:48:16,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:48:16,214 INFO L87 Difference]: Start difference. First operand 4356 states and 18668 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:16,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:16,784 INFO L93 Difference]: Finished difference Result 4588 states and 19551 transitions. [2022-01-18 15:48:16,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:48:16,785 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:48:16,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:16,795 INFO L225 Difference]: With dead ends: 4588 [2022-01-18 15:48:16,796 INFO L226 Difference]: Without dead ends: 4569 [2022-01-18 15:48:16,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:48:16,796 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 139 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:16,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 339 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 784 Invalid, 0 Unknown, 122 Unchecked, 0.3s Time] [2022-01-18 15:48:16,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4569 states. [2022-01-18 15:48:16,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4569 to 4368. [2022-01-18 15:48:16,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4368 states, 4367 states have (on average 4.2848637508587135) internal successors, (18712), 4367 states have internal predecessors, (18712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:16,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4368 states to 4368 states and 18712 transitions. [2022-01-18 15:48:16,863 INFO L78 Accepts]: Start accepts. Automaton has 4368 states and 18712 transitions. Word has length 23 [2022-01-18 15:48:16,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:16,863 INFO L470 AbstractCegarLoop]: Abstraction has 4368 states and 18712 transitions. [2022-01-18 15:48:16,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:16,863 INFO L276 IsEmpty]: Start isEmpty. Operand 4368 states and 18712 transitions. [2022-01-18 15:48:16,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:48:16,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:16,870 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:16,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2022-01-18 15:48:17,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2022-01-18 15:48:17,071 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:48:17,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:17,071 INFO L85 PathProgramCache]: Analyzing trace with hash -2062152446, now seen corresponding path program 69 times [2022-01-18 15:48:17,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:17,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671498922] [2022-01-18 15:48:17,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:17,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:17,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:17,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:17,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:17,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671498922] [2022-01-18 15:48:17,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671498922] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:17,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034163073] [2022-01-18 15:48:17,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:48:17,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:17,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:17,272 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:17,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-01-18 15:48:17,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:48:17,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:17,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 15:48:17,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:17,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:17,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:48:17,450 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:17,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 36 [2022-01-18 15:48:17,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:17,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:17,884 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:17,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:48:17,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:17,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:48:17,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:17,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034163073] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:17,936 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:17,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:48:17,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793147399] [2022-01-18 15:48:17,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:17,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:48:17,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:17,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:48:17,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:48:17,937 INFO L87 Difference]: Start difference. First operand 4368 states and 18712 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:19,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:19,236 INFO L93 Difference]: Finished difference Result 4765 states and 20207 transitions. [2022-01-18 15:48:19,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 15:48:19,236 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:48:19,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:19,247 INFO L225 Difference]: With dead ends: 4765 [2022-01-18 15:48:19,247 INFO L226 Difference]: Without dead ends: 4735 [2022-01-18 15:48:19,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=296, Invalid=1684, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 15:48:19,247 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 174 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 1533 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 1829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:19,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 595 Invalid, 1829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1533 Invalid, 0 Unknown, 205 Unchecked, 0.6s Time] [2022-01-18 15:48:19,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4735 states. [2022-01-18 15:48:19,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4735 to 4349. [2022-01-18 15:48:19,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4349 states, 4348 states have (on average 4.287948482060718) internal successors, (18644), 4348 states have internal predecessors, (18644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:19,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4349 states to 4349 states and 18644 transitions. [2022-01-18 15:48:19,315 INFO L78 Accepts]: Start accepts. Automaton has 4349 states and 18644 transitions. Word has length 23 [2022-01-18 15:48:19,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:19,315 INFO L470 AbstractCegarLoop]: Abstraction has 4349 states and 18644 transitions. [2022-01-18 15:48:19,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:19,315 INFO L276 IsEmpty]: Start isEmpty. Operand 4349 states and 18644 transitions. [2022-01-18 15:48:19,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:48:19,322 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:19,322 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:19,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2022-01-18 15:48:19,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:19,522 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:48:19,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:19,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1091032122, now seen corresponding path program 70 times [2022-01-18 15:48:19,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:19,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918017273] [2022-01-18 15:48:19,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:19,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:19,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:19,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:19,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918017273] [2022-01-18 15:48:19,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918017273] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:19,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760253644] [2022-01-18 15:48:19,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:48:19,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:19,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:19,707 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:19,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-01-18 15:48:19,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:48:19,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:19,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:48:19,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:19,857 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:19,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:48:20,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:20,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:20,426 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:20,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:48:20,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:20,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:48:20,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:20,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760253644] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:20,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:20,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:48:20,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853908436] [2022-01-18 15:48:20,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:20,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:48:20,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:20,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:48:20,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:48:20,481 INFO L87 Difference]: Start difference. First operand 4349 states and 18644 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:21,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:21,551 INFO L93 Difference]: Finished difference Result 4838 states and 20533 transitions. [2022-01-18 15:48:21,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:48:21,552 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:48:21,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:21,562 INFO L225 Difference]: With dead ends: 4838 [2022-01-18 15:48:21,562 INFO L226 Difference]: Without dead ends: 4812 [2022-01-18 15:48:21,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:48:21,562 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 164 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 1441 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 1686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:21,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 502 Invalid, 1686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1441 Invalid, 0 Unknown, 168 Unchecked, 0.6s Time] [2022-01-18 15:48:21,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4812 states. [2022-01-18 15:48:21,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4812 to 4349. [2022-01-18 15:48:21,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4349 states, 4348 states have (on average 4.287948482060718) internal successors, (18644), 4348 states have internal predecessors, (18644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:21,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4349 states to 4349 states and 18644 transitions. [2022-01-18 15:48:21,628 INFO L78 Accepts]: Start accepts. Automaton has 4349 states and 18644 transitions. Word has length 23 [2022-01-18 15:48:21,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:21,628 INFO L470 AbstractCegarLoop]: Abstraction has 4349 states and 18644 transitions. [2022-01-18 15:48:21,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:21,629 INFO L276 IsEmpty]: Start isEmpty. Operand 4349 states and 18644 transitions. [2022-01-18 15:48:21,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:48:21,635 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:21,635 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:21,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-01-18 15:48:21,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:21,836 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:48:21,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:21,836 INFO L85 PathProgramCache]: Analyzing trace with hash 597814736, now seen corresponding path program 71 times [2022-01-18 15:48:21,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:21,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280209473] [2022-01-18 15:48:21,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:21,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:21,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:22,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:22,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280209473] [2022-01-18 15:48:22,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280209473] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:22,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772293018] [2022-01-18 15:48:22,028 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:48:22,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:22,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:22,029 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:22,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-01-18 15:48:22,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:48:22,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:22,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:48:22,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:22,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:22,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:48:22,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:22,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:22,790 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:22,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:48:22,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:22,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:48:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:22,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772293018] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:22,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:22,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:48:22,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298449314] [2022-01-18 15:48:22,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:22,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:48:22,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:22,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:48:22,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:48:22,842 INFO L87 Difference]: Start difference. First operand 4349 states and 18644 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:23,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:23,766 INFO L93 Difference]: Finished difference Result 4738 states and 20133 transitions. [2022-01-18 15:48:23,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:48:23,766 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:48:23,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:23,778 INFO L225 Difference]: With dead ends: 4738 [2022-01-18 15:48:23,779 INFO L226 Difference]: Without dead ends: 4717 [2022-01-18 15:48:23,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=219, Invalid=1187, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:48:23,779 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 185 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:23,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 449 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1220 Invalid, 0 Unknown, 91 Unchecked, 0.5s Time] [2022-01-18 15:48:23,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4717 states. [2022-01-18 15:48:23,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4717 to 4349. [2022-01-18 15:48:23,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4349 states, 4348 states have (on average 4.287948482060718) internal successors, (18644), 4348 states have internal predecessors, (18644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:23,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4349 states to 4349 states and 18644 transitions. [2022-01-18 15:48:23,900 INFO L78 Accepts]: Start accepts. Automaton has 4349 states and 18644 transitions. Word has length 23 [2022-01-18 15:48:23,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:23,900 INFO L470 AbstractCegarLoop]: Abstraction has 4349 states and 18644 transitions. [2022-01-18 15:48:23,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:23,900 INFO L276 IsEmpty]: Start isEmpty. Operand 4349 states and 18644 transitions. [2022-01-18 15:48:23,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:48:23,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:23,907 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:23,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-01-18 15:48:24,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2022-01-18 15:48:24,108 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:48:24,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:24,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1532590992, now seen corresponding path program 72 times [2022-01-18 15:48:24,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:24,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414142121] [2022-01-18 15:48:24,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:24,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:24,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:24,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:24,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414142121] [2022-01-18 15:48:24,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414142121] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:24,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497396529] [2022-01-18 15:48:24,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:48:24,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:24,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:24,278 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:24,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-01-18 15:48:24,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:48:24,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:24,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:48:24,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:24,427 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:24,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:48:24,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:24,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:25,051 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:25,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:48:25,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:25,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:48:25,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:25,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497396529] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:25,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:25,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:48:25,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540736832] [2022-01-18 15:48:25,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:25,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:48:25,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:25,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:48:25,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:48:25,103 INFO L87 Difference]: Start difference. First operand 4349 states and 18644 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:25,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:25,954 INFO L93 Difference]: Finished difference Result 4756 states and 20198 transitions. [2022-01-18 15:48:25,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:48:25,954 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:48:25,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:25,966 INFO L225 Difference]: With dead ends: 4756 [2022-01-18 15:48:25,966 INFO L226 Difference]: Without dead ends: 4731 [2022-01-18 15:48:25,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:48:25,966 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 142 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:25,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 460 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1029 Invalid, 0 Unknown, 99 Unchecked, 0.4s Time] [2022-01-18 15:48:25,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4731 states. [2022-01-18 15:48:26,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4731 to 4353. [2022-01-18 15:48:26,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 4.287683823529412) internal successors, (18660), 4352 states have internal predecessors, (18660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:26,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 18660 transitions. [2022-01-18 15:48:26,036 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 18660 transitions. Word has length 23 [2022-01-18 15:48:26,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:26,036 INFO L470 AbstractCegarLoop]: Abstraction has 4353 states and 18660 transitions. [2022-01-18 15:48:26,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:26,037 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 18660 transitions. [2022-01-18 15:48:26,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:48:26,044 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:26,044 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:26,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2022-01-18 15:48:26,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:26,244 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:48:26,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:26,244 INFO L85 PathProgramCache]: Analyzing trace with hash 519898460, now seen corresponding path program 73 times [2022-01-18 15:48:26,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:26,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588414718] [2022-01-18 15:48:26,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:26,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:26,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:26,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:26,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588414718] [2022-01-18 15:48:26,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588414718] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:26,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497236498] [2022-01-18 15:48:26,429 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:48:26,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:26,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:26,430 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:26,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-01-18 15:48:26,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:26,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:48:26,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:26,594 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:26,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:48:27,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:27,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:27,249 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:27,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:48:27,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:27,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:48:27,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:27,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497236498] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:27,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:27,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:48:27,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718136985] [2022-01-18 15:48:27,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:27,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:48:27,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:27,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:48:27,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:48:27,303 INFO L87 Difference]: Start difference. First operand 4353 states and 18660 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:28,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:28,010 INFO L93 Difference]: Finished difference Result 4686 states and 19927 transitions. [2022-01-18 15:48:28,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:48:28,010 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:48:28,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:28,020 INFO L225 Difference]: With dead ends: 4686 [2022-01-18 15:48:28,020 INFO L226 Difference]: Without dead ends: 4665 [2022-01-18 15:48:28,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:48:28,021 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 134 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:28,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 386 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1063 Invalid, 0 Unknown, 134 Unchecked, 0.5s Time] [2022-01-18 15:48:28,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4665 states. [2022-01-18 15:48:28,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4665 to 4347. [2022-01-18 15:48:28,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4347 states, 4346 states have (on average 4.288080994017488) internal successors, (18636), 4346 states have internal predecessors, (18636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:28,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4347 states to 4347 states and 18636 transitions. [2022-01-18 15:48:28,087 INFO L78 Accepts]: Start accepts. Automaton has 4347 states and 18636 transitions. Word has length 23 [2022-01-18 15:48:28,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:28,087 INFO L470 AbstractCegarLoop]: Abstraction has 4347 states and 18636 transitions. [2022-01-18 15:48:28,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:28,087 INFO L276 IsEmpty]: Start isEmpty. Operand 4347 states and 18636 transitions. [2022-01-18 15:48:28,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:48:28,094 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:28,095 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:28,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2022-01-18 15:48:28,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-01-18 15:48:28,295 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:48:28,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:28,295 INFO L85 PathProgramCache]: Analyzing trace with hash 175331356, now seen corresponding path program 74 times [2022-01-18 15:48:28,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:28,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773272949] [2022-01-18 15:48:28,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:28,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:28,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:28,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:28,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773272949] [2022-01-18 15:48:28,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773272949] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:28,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712485739] [2022-01-18 15:48:28,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:48:28,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:28,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:28,460 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:28,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-01-18 15:48:28,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:48:28,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:28,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:48:28,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:28,662 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:28,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2022-01-18 15:48:28,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:28,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:29,148 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:29,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:48:29,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:29,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:48:29,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:29,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712485739] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:29,202 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:29,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:48:29,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446822516] [2022-01-18 15:48:29,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:29,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:48:29,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:29,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:48:29,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:48:29,202 INFO L87 Difference]: Start difference. First operand 4347 states and 18636 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:30,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:30,170 INFO L93 Difference]: Finished difference Result 4955 states and 20980 transitions. [2022-01-18 15:48:30,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:48:30,170 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:48:30,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:30,181 INFO L225 Difference]: With dead ends: 4955 [2022-01-18 15:48:30,181 INFO L226 Difference]: Without dead ends: 4933 [2022-01-18 15:48:30,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=253, Invalid=1387, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:48:30,182 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 236 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:30,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 615 Invalid, 1589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1442 Invalid, 0 Unknown, 81 Unchecked, 0.6s Time] [2022-01-18 15:48:30,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4933 states. [2022-01-18 15:48:30,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4933 to 4359. [2022-01-18 15:48:30,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4359 states, 4358 states have (on average 4.286369894446994) internal successors, (18680), 4358 states have internal predecessors, (18680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:30,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 18680 transitions. [2022-01-18 15:48:30,250 INFO L78 Accepts]: Start accepts. Automaton has 4359 states and 18680 transitions. Word has length 23 [2022-01-18 15:48:30,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:30,250 INFO L470 AbstractCegarLoop]: Abstraction has 4359 states and 18680 transitions. [2022-01-18 15:48:30,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:30,250 INFO L276 IsEmpty]: Start isEmpty. Operand 4359 states and 18680 transitions. [2022-01-18 15:48:30,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:48:30,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:30,257 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:30,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2022-01-18 15:48:30,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-01-18 15:48:30,457 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:48:30,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:30,458 INFO L85 PathProgramCache]: Analyzing trace with hash 760665308, now seen corresponding path program 75 times [2022-01-18 15:48:30,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:30,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917253760] [2022-01-18 15:48:30,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:30,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:30,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:30,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:30,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:30,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917253760] [2022-01-18 15:48:30,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917253760] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:30,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357346891] [2022-01-18 15:48:30,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:48:30,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:30,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:30,656 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:30,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-01-18 15:48:30,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:48:30,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:30,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:48:30,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:30,921 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:30,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:48:31,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:31,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:31,465 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:31,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:48:31,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:31,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:48:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:31,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357346891] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:31,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:31,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:48:31,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676194076] [2022-01-18 15:48:31,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:31,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:48:31,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:31,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:48:31,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:48:31,534 INFO L87 Difference]: Start difference. First operand 4359 states and 18680 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:32,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:32,756 INFO L93 Difference]: Finished difference Result 4896 states and 20755 transitions. [2022-01-18 15:48:32,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:48:32,756 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:48:32,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:32,771 INFO L225 Difference]: With dead ends: 4896 [2022-01-18 15:48:32,771 INFO L226 Difference]: Without dead ends: 4870 [2022-01-18 15:48:32,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=253, Invalid=1387, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:48:32,772 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 235 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 1249 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 1426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:32,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 526 Invalid, 1426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1249 Invalid, 0 Unknown, 109 Unchecked, 0.7s Time] [2022-01-18 15:48:32,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4870 states. [2022-01-18 15:48:32,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4870 to 4359. [2022-01-18 15:48:32,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4359 states, 4358 states have (on average 4.286369894446994) internal successors, (18680), 4358 states have internal predecessors, (18680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:32,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 18680 transitions. [2022-01-18 15:48:32,929 INFO L78 Accepts]: Start accepts. Automaton has 4359 states and 18680 transitions. Word has length 23 [2022-01-18 15:48:32,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:32,929 INFO L470 AbstractCegarLoop]: Abstraction has 4359 states and 18680 transitions. [2022-01-18 15:48:32,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:32,929 INFO L276 IsEmpty]: Start isEmpty. Operand 4359 states and 18680 transitions. [2022-01-18 15:48:32,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:48:32,939 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:32,939 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:32,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2022-01-18 15:48:33,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:33,152 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:48:33,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:33,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1920735254, now seen corresponding path program 76 times [2022-01-18 15:48:33,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:33,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683720023] [2022-01-18 15:48:33,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:33,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:33,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:33,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:33,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:33,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683720023] [2022-01-18 15:48:33,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683720023] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:33,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63646078] [2022-01-18 15:48:33,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:48:33,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:33,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:33,375 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:33,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-01-18 15:48:33,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:48:33,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:33,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:48:33,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:33,591 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:33,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:48:34,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:34,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:34,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:34,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:48:34,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:34,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:48:34,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:34,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63646078] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:34,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:34,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:48:34,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000239999] [2022-01-18 15:48:34,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:34,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:48:34,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:34,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:48:34,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:48:34,339 INFO L87 Difference]: Start difference. First operand 4359 states and 18680 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:35,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:35,603 INFO L93 Difference]: Finished difference Result 4866 states and 20631 transitions. [2022-01-18 15:48:35,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:48:35,604 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:48:35,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:35,615 INFO L225 Difference]: With dead ends: 4866 [2022-01-18 15:48:35,615 INFO L226 Difference]: Without dead ends: 4845 [2022-01-18 15:48:35,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=293, Invalid=1347, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:48:35,615 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 218 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 1586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:35,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 554 Invalid, 1586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1405 Invalid, 0 Unknown, 92 Unchecked, 0.7s Time] [2022-01-18 15:48:35,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4845 states. [2022-01-18 15:48:35,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4845 to 4355. [2022-01-18 15:48:35,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4355 states, 4354 states have (on average 4.286173633440514) internal successors, (18662), 4354 states have internal predecessors, (18662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:35,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4355 states to 4355 states and 18662 transitions. [2022-01-18 15:48:35,686 INFO L78 Accepts]: Start accepts. Automaton has 4355 states and 18662 transitions. Word has length 23 [2022-01-18 15:48:35,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:35,686 INFO L470 AbstractCegarLoop]: Abstraction has 4355 states and 18662 transitions. [2022-01-18 15:48:35,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:35,687 INFO L276 IsEmpty]: Start isEmpty. Operand 4355 states and 18662 transitions. [2022-01-18 15:48:35,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:48:35,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:35,694 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:35,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2022-01-18 15:48:35,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-01-18 15:48:35,894 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:48:35,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:35,894 INFO L85 PathProgramCache]: Analyzing trace with hash 524828734, now seen corresponding path program 77 times [2022-01-18 15:48:35,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:35,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089300128] [2022-01-18 15:48:35,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:35,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:35,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:36,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:36,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:36,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089300128] [2022-01-18 15:48:36,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089300128] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:36,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814346798] [2022-01-18 15:48:36,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:48:36,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:36,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:36,073 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:36,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-01-18 15:48:36,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:48:36,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:36,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:48:36,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:36,249 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:36,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:48:36,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:36,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:36,712 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:36,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:48:36,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:36,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:48:36,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:36,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814346798] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:36,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:36,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:48:36,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642073681] [2022-01-18 15:48:36,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:36,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:48:36,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:36,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:48:36,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:48:36,765 INFO L87 Difference]: Start difference. First operand 4355 states and 18662 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:37,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:37,966 INFO L93 Difference]: Finished difference Result 5198 states and 21919 transitions. [2022-01-18 15:48:37,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:48:37,966 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:48:37,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:37,979 INFO L225 Difference]: With dead ends: 5198 [2022-01-18 15:48:37,979 INFO L226 Difference]: Without dead ends: 5163 [2022-01-18 15:48:37,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=273, Invalid=1449, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:48:37,980 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 215 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 1842 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 2081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:37,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 684 Invalid, 2081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1842 Invalid, 0 Unknown, 192 Unchecked, 0.7s Time] [2022-01-18 15:48:37,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5163 states. [2022-01-18 15:48:38,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5163 to 4354. [2022-01-18 15:48:38,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4354 states, 4353 states have (on average 4.28118538938663) internal successors, (18636), 4353 states have internal predecessors, (18636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:38,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4354 states to 4354 states and 18636 transitions. [2022-01-18 15:48:38,061 INFO L78 Accepts]: Start accepts. Automaton has 4354 states and 18636 transitions. Word has length 23 [2022-01-18 15:48:38,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:38,061 INFO L470 AbstractCegarLoop]: Abstraction has 4354 states and 18636 transitions. [2022-01-18 15:48:38,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:38,061 INFO L276 IsEmpty]: Start isEmpty. Operand 4354 states and 18636 transitions. [2022-01-18 15:48:38,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:48:38,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:38,069 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:38,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2022-01-18 15:48:38,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:38,275 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:48:38,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:38,276 INFO L85 PathProgramCache]: Analyzing trace with hash 606227790, now seen corresponding path program 78 times [2022-01-18 15:48:38,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:38,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417601688] [2022-01-18 15:48:38,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:38,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:38,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:38,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:38,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417601688] [2022-01-18 15:48:38,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417601688] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:38,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249737286] [2022-01-18 15:48:38,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:48:38,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:38,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:38,443 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:38,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-01-18 15:48:38,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:48:38,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:38,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:48:38,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:38,604 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:38,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:48:38,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:38,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:39,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:39,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:48:39,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:39,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:48:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:39,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249737286] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:39,190 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:39,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:48:39,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034429861] [2022-01-18 15:48:39,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:39,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:48:39,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:39,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:48:39,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:48:39,190 INFO L87 Difference]: Start difference. First operand 4354 states and 18636 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:40,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:40,260 INFO L93 Difference]: Finished difference Result 4864 states and 20604 transitions. [2022-01-18 15:48:40,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 15:48:40,260 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:48:40,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:40,271 INFO L225 Difference]: With dead ends: 4864 [2022-01-18 15:48:40,271 INFO L226 Difference]: Without dead ends: 4838 [2022-01-18 15:48:40,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=306, Invalid=1500, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 15:48:40,272 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 292 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:40,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 473 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1169 Invalid, 0 Unknown, 91 Unchecked, 0.5s Time] [2022-01-18 15:48:40,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4838 states. [2022-01-18 15:48:40,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4838 to 4348. [2022-01-18 15:48:40,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4348 states, 4347 states have (on average 4.2815734989648035) internal successors, (18612), 4347 states have internal predecessors, (18612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:40,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4348 states to 4348 states and 18612 transitions. [2022-01-18 15:48:40,340 INFO L78 Accepts]: Start accepts. Automaton has 4348 states and 18612 transitions. Word has length 23 [2022-01-18 15:48:40,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:40,340 INFO L470 AbstractCegarLoop]: Abstraction has 4348 states and 18612 transitions. [2022-01-18 15:48:40,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:40,340 INFO L276 IsEmpty]: Start isEmpty. Operand 4348 states and 18612 transitions. [2022-01-18 15:48:40,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:48:40,347 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:40,347 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:40,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2022-01-18 15:48:40,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2022-01-18 15:48:40,548 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:48:40,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:40,548 INFO L85 PathProgramCache]: Analyzing trace with hash 241790372, now seen corresponding path program 79 times [2022-01-18 15:48:40,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:40,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977408249] [2022-01-18 15:48:40,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:40,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:40,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:40,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:40,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977408249] [2022-01-18 15:48:40,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977408249] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:40,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441443287] [2022-01-18 15:48:40,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:48:40,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:40,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:40,717 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:40,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-01-18 15:48:40,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:40,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:48:40,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:40,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:40,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2022-01-18 15:48:41,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:41,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:41,391 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:41,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:48:41,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:41,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:48:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:41,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441443287] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:41,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:41,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:48:41,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431224699] [2022-01-18 15:48:41,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:41,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:48:41,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:41,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:48:41,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:48:41,443 INFO L87 Difference]: Start difference. First operand 4348 states and 18612 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:42,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:42,503 INFO L93 Difference]: Finished difference Result 4846 states and 20540 transitions. [2022-01-18 15:48:42,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:48:42,503 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:48:42,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:42,514 INFO L225 Difference]: With dead ends: 4846 [2022-01-18 15:48:42,514 INFO L226 Difference]: Without dead ends: 4824 [2022-01-18 15:48:42,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=223, Invalid=1417, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:48:42,514 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 167 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 1718 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 1861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:42,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 689 Invalid, 1861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1718 Invalid, 0 Unknown, 84 Unchecked, 0.7s Time] [2022-01-18 15:48:42,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4824 states. [2022-01-18 15:48:42,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4824 to 4356. [2022-01-18 15:48:42,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4356 states, 4355 states have (on average 4.2815154994259474) internal successors, (18646), 4355 states have internal predecessors, (18646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:42,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4356 states to 4356 states and 18646 transitions. [2022-01-18 15:48:42,581 INFO L78 Accepts]: Start accepts. Automaton has 4356 states and 18646 transitions. Word has length 23 [2022-01-18 15:48:42,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:42,581 INFO L470 AbstractCegarLoop]: Abstraction has 4356 states and 18646 transitions. [2022-01-18 15:48:42,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:42,581 INFO L276 IsEmpty]: Start isEmpty. Operand 4356 states and 18646 transitions. [2022-01-18 15:48:42,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:48:42,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:42,588 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:42,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2022-01-18 15:48:42,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:42,789 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:48:42,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:42,789 INFO L85 PathProgramCache]: Analyzing trace with hash 827124324, now seen corresponding path program 80 times [2022-01-18 15:48:42,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:42,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386550321] [2022-01-18 15:48:42,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:42,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:42,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:42,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:42,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:42,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386550321] [2022-01-18 15:48:42,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386550321] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:42,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54626014] [2022-01-18 15:48:42,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:48:42,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:42,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:42,954 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:42,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-01-18 15:48:42,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:48:42,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:42,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:48:42,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:43,123 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:43,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:48:43,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:43,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:43,631 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:43,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:48:43,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:43,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:48:43,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:43,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54626014] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:43,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:43,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:48:43,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686534195] [2022-01-18 15:48:43,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:43,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:48:43,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:43,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:48:43,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:48:43,690 INFO L87 Difference]: Start difference. First operand 4356 states and 18646 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:44,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:44,963 INFO L93 Difference]: Finished difference Result 4770 states and 20240 transitions. [2022-01-18 15:48:44,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 15:48:44,963 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:48:44,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:45,002 INFO L225 Difference]: With dead ends: 4770 [2022-01-18 15:48:45,002 INFO L226 Difference]: Without dead ends: 4744 [2022-01-18 15:48:45,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=289, Invalid=1691, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 15:48:45,002 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 198 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 1582 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:45,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 572 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1582 Invalid, 0 Unknown, 120 Unchecked, 0.6s Time] [2022-01-18 15:48:45,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4744 states. [2022-01-18 15:48:45,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4744 to 4356. [2022-01-18 15:48:45,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4356 states, 4355 states have (on average 4.2815154994259474) internal successors, (18646), 4355 states have internal predecessors, (18646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:45,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4356 states to 4356 states and 18646 transitions. [2022-01-18 15:48:45,090 INFO L78 Accepts]: Start accepts. Automaton has 4356 states and 18646 transitions. Word has length 23 [2022-01-18 15:48:45,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:45,090 INFO L470 AbstractCegarLoop]: Abstraction has 4356 states and 18646 transitions. [2022-01-18 15:48:45,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:45,090 INFO L276 IsEmpty]: Start isEmpty. Operand 4356 states and 18646 transitions. [2022-01-18 15:48:45,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:48:45,100 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:45,100 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:45,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-01-18 15:48:45,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:45,322 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:48:45,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:45,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1854276238, now seen corresponding path program 81 times [2022-01-18 15:48:45,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:45,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165581078] [2022-01-18 15:48:45,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:45,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:45,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:45,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:45,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:45,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165581078] [2022-01-18 15:48:45,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165581078] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:45,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771986611] [2022-01-18 15:48:45,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:48:45,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:45,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:45,500 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:45,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-01-18 15:48:45,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:48:45,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:45,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:48:45,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:45,670 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:45,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:48:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:46,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:46,239 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:46,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:48:46,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:46,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:48:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:46,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771986611] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:46,290 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:46,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:48:46,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542130813] [2022-01-18 15:48:46,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:46,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:48:46,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:46,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:48:46,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:48:46,291 INFO L87 Difference]: Start difference. First operand 4356 states and 18646 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:47,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:47,365 INFO L93 Difference]: Finished difference Result 4791 states and 20320 transitions. [2022-01-18 15:48:47,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:48:47,365 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:48:47,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:47,376 INFO L225 Difference]: With dead ends: 4791 [2022-01-18 15:48:47,376 INFO L226 Difference]: Without dead ends: 4770 [2022-01-18 15:48:47,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=272, Invalid=1450, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:48:47,377 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 189 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:47,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 470 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1267 Invalid, 0 Unknown, 82 Unchecked, 0.5s Time] [2022-01-18 15:48:47,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4770 states. [2022-01-18 15:48:47,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4770 to 4352. [2022-01-18 15:48:47,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4352 states, 4351 states have (on average 4.281314640312572) internal successors, (18628), 4351 states have internal predecessors, (18628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:47,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4352 states to 4352 states and 18628 transitions. [2022-01-18 15:48:47,494 INFO L78 Accepts]: Start accepts. Automaton has 4352 states and 18628 transitions. Word has length 23 [2022-01-18 15:48:47,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:47,494 INFO L470 AbstractCegarLoop]: Abstraction has 4352 states and 18628 transitions. [2022-01-18 15:48:47,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:47,494 INFO L276 IsEmpty]: Start isEmpty. Operand 4352 states and 18628 transitions. [2022-01-18 15:48:47,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:48:47,502 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:47,502 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:47,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2022-01-18 15:48:47,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable174 [2022-01-18 15:48:47,702 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:48:47,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:47,703 INFO L85 PathProgramCache]: Analyzing trace with hash 396227890, now seen corresponding path program 82 times [2022-01-18 15:48:47,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:47,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085456963] [2022-01-18 15:48:47,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:47,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:47,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:47,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:47,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085456963] [2022-01-18 15:48:47,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085456963] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:47,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369661559] [2022-01-18 15:48:47,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:48:47,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:47,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:47,892 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:47,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-01-18 15:48:47,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:48:47,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:47,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:48:47,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:48,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:48,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2022-01-18 15:48:48,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:48,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:48,579 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:48,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:48:48,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:48,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:48:48,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:48,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369661559] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:48,632 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:48,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:48:48,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267487911] [2022-01-18 15:48:48,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:48,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:48:48,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:48,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:48:48,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:48:48,632 INFO L87 Difference]: Start difference. First operand 4352 states and 18628 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:49,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:49,359 INFO L93 Difference]: Finished difference Result 4686 states and 19912 transitions. [2022-01-18 15:48:49,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:48:49,359 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:48:49,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:49,370 INFO L225 Difference]: With dead ends: 4686 [2022-01-18 15:48:49,370 INFO L226 Difference]: Without dead ends: 4663 [2022-01-18 15:48:49,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:48:49,371 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 124 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 1418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:49,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 544 Invalid, 1418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1296 Invalid, 0 Unknown, 76 Unchecked, 0.5s Time] [2022-01-18 15:48:49,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4663 states. [2022-01-18 15:48:49,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4663 to 4356. [2022-01-18 15:48:49,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4356 states, 4355 states have (on average 4.28105625717566) internal successors, (18644), 4355 states have internal predecessors, (18644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:49,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4356 states to 4356 states and 18644 transitions. [2022-01-18 15:48:49,438 INFO L78 Accepts]: Start accepts. Automaton has 4356 states and 18644 transitions. Word has length 23 [2022-01-18 15:48:49,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:49,438 INFO L470 AbstractCegarLoop]: Abstraction has 4356 states and 18644 transitions. [2022-01-18 15:48:49,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:49,438 INFO L276 IsEmpty]: Start isEmpty. Operand 4356 states and 18644 transitions. [2022-01-18 15:48:49,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:48:49,445 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:49,445 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:49,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2022-01-18 15:48:49,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:49,646 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:48:49,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:49,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1860076704, now seen corresponding path program 83 times [2022-01-18 15:48:49,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:49,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974694724] [2022-01-18 15:48:49,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:49,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:49,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:49,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:49,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974694724] [2022-01-18 15:48:49,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974694724] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:49,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116648082] [2022-01-18 15:48:49,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:48:49,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:49,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:49,810 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:49,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-01-18 15:48:49,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:48:49,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:49,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:48:49,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:50,005 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:50,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:48:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:50,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:50,518 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:50,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:48:50,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:50,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:48:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:50,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116648082] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:50,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:50,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:48:50,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003781341] [2022-01-18 15:48:50,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:50,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:48:50,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:50,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:48:50,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:48:50,568 INFO L87 Difference]: Start difference. First operand 4356 states and 18644 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:51,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:51,536 INFO L93 Difference]: Finished difference Result 4607 states and 19600 transitions. [2022-01-18 15:48:51,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:48:51,536 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:48:51,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:51,547 INFO L225 Difference]: With dead ends: 4607 [2022-01-18 15:48:51,547 INFO L226 Difference]: Without dead ends: 4585 [2022-01-18 15:48:51,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=1221, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:48:51,548 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 137 mSDsluCounter, 1027 mSDsCounter, 0 mSdLazyCounter, 1731 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 1939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:51,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 642 Invalid, 1939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1731 Invalid, 0 Unknown, 154 Unchecked, 0.7s Time] [2022-01-18 15:48:51,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4585 states. [2022-01-18 15:48:51,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4585 to 4356. [2022-01-18 15:48:51,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4356 states, 4355 states have (on average 4.28105625717566) internal successors, (18644), 4355 states have internal predecessors, (18644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:51,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4356 states to 4356 states and 18644 transitions. [2022-01-18 15:48:51,647 INFO L78 Accepts]: Start accepts. Automaton has 4356 states and 18644 transitions. Word has length 23 [2022-01-18 15:48:51,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:51,647 INFO L470 AbstractCegarLoop]: Abstraction has 4356 states and 18644 transitions. [2022-01-18 15:48:51,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:51,647 INFO L276 IsEmpty]: Start isEmpty. Operand 4356 states and 18644 transitions. [2022-01-18 15:48:51,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:48:51,656 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:51,656 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:51,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2022-01-18 15:48:51,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:51,875 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:48:51,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:51,876 INFO L85 PathProgramCache]: Analyzing trace with hash -564656732, now seen corresponding path program 84 times [2022-01-18 15:48:51,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:51,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838900787] [2022-01-18 15:48:51,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:51,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:51,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:52,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:52,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:52,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838900787] [2022-01-18 15:48:52,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838900787] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:52,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462070180] [2022-01-18 15:48:52,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:48:52,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:52,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:52,128 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:52,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-01-18 15:48:52,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:48:52,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:52,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:48:52,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:52,304 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:52,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:48:54,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:54,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:54,909 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:54,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:48:54,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:54,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:48:54,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:54,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462070180] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:54,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:54,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:48:54,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865685494] [2022-01-18 15:48:54,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:54,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:48:54,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:54,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:48:54,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=563, Unknown=1, NotChecked=0, Total=650 [2022-01-18 15:48:54,964 INFO L87 Difference]: Start difference. First operand 4356 states and 18644 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:56,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:56,140 INFO L93 Difference]: Finished difference Result 4685 states and 19902 transitions. [2022-01-18 15:48:56,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:48:56,140 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:48:56,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:56,151 INFO L225 Difference]: With dead ends: 4685 [2022-01-18 15:48:56,151 INFO L226 Difference]: Without dead ends: 4659 [2022-01-18 15:48:56,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=272, Invalid=1367, Unknown=1, NotChecked=0, Total=1640 [2022-01-18 15:48:56,151 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 189 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 1230 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:56,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 415 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1230 Invalid, 0 Unknown, 91 Unchecked, 0.6s Time] [2022-01-18 15:48:56,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4659 states. [2022-01-18 15:48:56,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4659 to 4363. [2022-01-18 15:48:56,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4363 states, 4362 states have (on average 4.279688216414489) internal successors, (18668), 4362 states have internal predecessors, (18668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:56,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4363 states to 4363 states and 18668 transitions. [2022-01-18 15:48:56,221 INFO L78 Accepts]: Start accepts. Automaton has 4363 states and 18668 transitions. Word has length 23 [2022-01-18 15:48:56,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:56,221 INFO L470 AbstractCegarLoop]: Abstraction has 4363 states and 18668 transitions. [2022-01-18 15:48:56,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:56,221 INFO L276 IsEmpty]: Start isEmpty. Operand 4363 states and 18668 transitions. [2022-01-18 15:48:56,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:48:56,228 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:56,228 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:56,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2022-01-18 15:48:56,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:56,429 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:48:56,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:56,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1606232800, now seen corresponding path program 85 times [2022-01-18 15:48:56,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:56,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647322168] [2022-01-18 15:48:56,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:56,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:56,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:56,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:56,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:56,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647322168] [2022-01-18 15:48:56,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647322168] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:56,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467862761] [2022-01-18 15:48:56,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:48:56,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:56,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:56,607 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:56,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-01-18 15:48:56,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:56,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:48:56,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:56,771 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:56,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:48:57,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:57,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:57,532 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:57,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:48:57,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:48:57,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:48:57,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:57,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467862761] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:48:57,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:48:57,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:48:57,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024839213] [2022-01-18 15:48:57,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:48:57,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:48:57,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:48:57,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:48:57,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:48:57,606 INFO L87 Difference]: Start difference. First operand 4363 states and 18668 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:58,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:48:58,693 INFO L93 Difference]: Finished difference Result 4696 states and 19934 transitions. [2022-01-18 15:48:58,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:48:58,693 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:48:58,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:48:58,736 INFO L225 Difference]: With dead ends: 4696 [2022-01-18 15:48:58,736 INFO L226 Difference]: Without dead ends: 4668 [2022-01-18 15:48:58,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=231, Invalid=1175, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:48:58,736 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 148 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 1433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:48:58,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 474 Invalid, 1433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1263 Invalid, 0 Unknown, 77 Unchecked, 0.6s Time] [2022-01-18 15:48:58,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4668 states. [2022-01-18 15:48:58,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4668 to 4356. [2022-01-18 15:48:58,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4356 states, 4355 states have (on average 4.28105625717566) internal successors, (18644), 4355 states have internal predecessors, (18644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:58,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4356 states to 4356 states and 18644 transitions. [2022-01-18 15:48:58,814 INFO L78 Accepts]: Start accepts. Automaton has 4356 states and 18644 transitions. Word has length 23 [2022-01-18 15:48:58,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:48:58,814 INFO L470 AbstractCegarLoop]: Abstraction has 4356 states and 18644 transitions. [2022-01-18 15:48:58,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:48:58,815 INFO L276 IsEmpty]: Start isEmpty. Operand 4356 states and 18644 transitions. [2022-01-18 15:48:58,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:48:58,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:48:58,822 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:48:58,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2022-01-18 15:48:59,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2022-01-18 15:48:59,022 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:48:59,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:48:59,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1893354152, now seen corresponding path program 86 times [2022-01-18 15:48:59,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:48:59,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778133083] [2022-01-18 15:48:59,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:48:59,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:48:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:48:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:59,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:48:59,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778133083] [2022-01-18 15:48:59,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778133083] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:48:59,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253333754] [2022-01-18 15:48:59,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:48:59,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:48:59,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:48:59,230 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:48:59,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-01-18 15:48:59,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:48:59,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:48:59,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:48:59,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:48:59,404 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:59,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:48:59,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:48:59,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:48:59,994 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:48:59,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:49:00,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:00,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:49:00,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:00,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253333754] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:00,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:00,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:49:00,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341255157] [2022-01-18 15:49:00,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:00,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:49:00,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:00,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:49:00,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:49:00,049 INFO L87 Difference]: Start difference. First operand 4356 states and 18644 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:01,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:01,129 INFO L93 Difference]: Finished difference Result 4693 states and 19940 transitions. [2022-01-18 15:49:01,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:49:01,129 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:49:01,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:01,140 INFO L225 Difference]: With dead ends: 4693 [2022-01-18 15:49:01,140 INFO L226 Difference]: Without dead ends: 4667 [2022-01-18 15:49:01,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=261, Invalid=1461, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:49:01,140 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 190 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:01,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 418 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1107 Invalid, 0 Unknown, 90 Unchecked, 0.5s Time] [2022-01-18 15:49:01,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4667 states. [2022-01-18 15:49:01,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4667 to 4356. [2022-01-18 15:49:01,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4356 states, 4355 states have (on average 4.28105625717566) internal successors, (18644), 4355 states have internal predecessors, (18644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:01,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4356 states to 4356 states and 18644 transitions. [2022-01-18 15:49:01,250 INFO L78 Accepts]: Start accepts. Automaton has 4356 states and 18644 transitions. Word has length 23 [2022-01-18 15:49:01,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:01,250 INFO L470 AbstractCegarLoop]: Abstraction has 4356 states and 18644 transitions. [2022-01-18 15:49:01,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:01,250 INFO L276 IsEmpty]: Start isEmpty. Operand 4356 states and 18644 transitions. [2022-01-18 15:49:01,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:49:01,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:01,257 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:01,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Ended with exit code 0 [2022-01-18 15:49:01,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-01-18 15:49:01,458 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:49:01,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:01,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1908395758, now seen corresponding path program 87 times [2022-01-18 15:49:01,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:01,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622661428] [2022-01-18 15:49:01,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:01,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:01,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:01,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:01,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:01,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622661428] [2022-01-18 15:49:01,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622661428] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:01,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463058868] [2022-01-18 15:49:01,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:49:01,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:01,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:01,642 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:01,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-01-18 15:49:01,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:49:01,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:01,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:49:01,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:01,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:01,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:49:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:02,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:02,454 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:02,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:49:02,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:02,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:49:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:02,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463058868] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:02,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:02,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:49:02,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915640820] [2022-01-18 15:49:02,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:02,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:49:02,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:02,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:49:02,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:49:02,508 INFO L87 Difference]: Start difference. First operand 4356 states and 18644 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:03,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:03,531 INFO L93 Difference]: Finished difference Result 4686 states and 19912 transitions. [2022-01-18 15:49:03,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:49:03,531 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:49:03,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:03,542 INFO L225 Difference]: With dead ends: 4686 [2022-01-18 15:49:03,542 INFO L226 Difference]: Without dead ends: 4665 [2022-01-18 15:49:03,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=262, Invalid=1378, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:49:03,542 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 175 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:03,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 413 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1117 Invalid, 0 Unknown, 112 Unchecked, 0.5s Time] [2022-01-18 15:49:03,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4665 states. [2022-01-18 15:49:03,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4665 to 4354. [2022-01-18 15:49:03,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4354 states, 4353 states have (on average 4.28118538938663) internal successors, (18636), 4353 states have internal predecessors, (18636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:03,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4354 states to 4354 states and 18636 transitions. [2022-01-18 15:49:03,608 INFO L78 Accepts]: Start accepts. Automaton has 4354 states and 18636 transitions. Word has length 23 [2022-01-18 15:49:03,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:03,608 INFO L470 AbstractCegarLoop]: Abstraction has 4354 states and 18636 transitions. [2022-01-18 15:49:03,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:03,608 INFO L276 IsEmpty]: Start isEmpty. Operand 4354 states and 18636 transitions. [2022-01-18 15:49:03,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:49:03,615 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:03,615 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:03,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2022-01-18 15:49:03,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:03,815 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:49:03,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:03,815 INFO L85 PathProgramCache]: Analyzing trace with hash -721141010, now seen corresponding path program 88 times [2022-01-18 15:49:03,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:03,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304219744] [2022-01-18 15:49:03,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:03,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:03,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:03,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:03,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:03,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304219744] [2022-01-18 15:49:03,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304219744] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:03,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284934101] [2022-01-18 15:49:03,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:49:03,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:03,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:03,980 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:03,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-01-18 15:49:04,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:49:04,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:04,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:49:04,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:04,205 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:04,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:49:04,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:04,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:04,683 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:04,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:49:04,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:04,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:49:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:04,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284934101] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:04,734 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:04,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:49:04,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502666293] [2022-01-18 15:49:04,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:04,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:49:04,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:04,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:49:04,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:49:04,735 INFO L87 Difference]: Start difference. First operand 4354 states and 18636 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:05,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:05,674 INFO L93 Difference]: Finished difference Result 4684 states and 19876 transitions. [2022-01-18 15:49:05,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:49:05,674 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:49:05,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:05,684 INFO L225 Difference]: With dead ends: 4684 [2022-01-18 15:49:05,684 INFO L226 Difference]: Without dead ends: 4638 [2022-01-18 15:49:05,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=227, Invalid=1495, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:49:05,685 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 142 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:05,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 496 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1184 Invalid, 0 Unknown, 41 Unchecked, 0.5s Time] [2022-01-18 15:49:05,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4638 states. [2022-01-18 15:49:05,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4638 to 4350. [2022-01-18 15:49:05,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4350 states, 4349 states have (on average 4.281444010117268) internal successors, (18620), 4349 states have internal predecessors, (18620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:05,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4350 states to 4350 states and 18620 transitions. [2022-01-18 15:49:05,752 INFO L78 Accepts]: Start accepts. Automaton has 4350 states and 18620 transitions. Word has length 23 [2022-01-18 15:49:05,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:05,752 INFO L470 AbstractCegarLoop]: Abstraction has 4350 states and 18620 transitions. [2022-01-18 15:49:05,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:05,752 INFO L276 IsEmpty]: Start isEmpty. Operand 4350 states and 18620 transitions. [2022-01-18 15:49:05,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:49:05,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:05,759 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:05,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2022-01-18 15:49:05,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2022-01-18 15:49:05,959 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:49:05,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:05,960 INFO L85 PathProgramCache]: Analyzing trace with hash -49323858, now seen corresponding path program 89 times [2022-01-18 15:49:05,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:05,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691246338] [2022-01-18 15:49:05,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:05,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:05,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:06,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:06,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:06,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691246338] [2022-01-18 15:49:06,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691246338] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:06,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903327598] [2022-01-18 15:49:06,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:49:06,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:06,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:06,121 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:06,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-01-18 15:49:06,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:49:06,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:06,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:49:06,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:06,318 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:06,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 42 [2022-01-18 15:49:06,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:06,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:06,804 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:06,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:49:06,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:06,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:49:06,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:06,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903327598] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:06,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:06,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:49:06,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556228031] [2022-01-18 15:49:06,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:06,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:49:06,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:06,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:49:06,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:49:06,856 INFO L87 Difference]: Start difference. First operand 4350 states and 18620 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:07,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:07,923 INFO L93 Difference]: Finished difference Result 4661 states and 19808 transitions. [2022-01-18 15:49:07,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:49:07,923 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:49:07,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:07,934 INFO L225 Difference]: With dead ends: 4661 [2022-01-18 15:49:07,934 INFO L226 Difference]: Without dead ends: 4639 [2022-01-18 15:49:07,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=226, Invalid=1496, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:49:07,935 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 198 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 1512 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 1670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:07,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 620 Invalid, 1670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1512 Invalid, 0 Unknown, 87 Unchecked, 0.6s Time] [2022-01-18 15:49:07,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4639 states. [2022-01-18 15:49:07,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4639 to 4350. [2022-01-18 15:49:07,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4350 states, 4349 states have (on average 4.281444010117268) internal successors, (18620), 4349 states have internal predecessors, (18620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:08,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4350 states to 4350 states and 18620 transitions. [2022-01-18 15:49:08,003 INFO L78 Accepts]: Start accepts. Automaton has 4350 states and 18620 transitions. Word has length 23 [2022-01-18 15:49:08,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:08,003 INFO L470 AbstractCegarLoop]: Abstraction has 4350 states and 18620 transitions. [2022-01-18 15:49:08,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:08,004 INFO L276 IsEmpty]: Start isEmpty. Operand 4350 states and 18620 transitions. [2022-01-18 15:49:08,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:49:08,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:08,011 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:08,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Forceful destruction successful, exit code 0 [2022-01-18 15:49:08,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:08,211 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:49:08,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:08,211 INFO L85 PathProgramCache]: Analyzing trace with hash 464202994, now seen corresponding path program 90 times [2022-01-18 15:49:08,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:08,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006698837] [2022-01-18 15:49:08,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:08,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:08,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:08,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:08,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:08,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006698837] [2022-01-18 15:49:08,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006698837] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:08,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199310707] [2022-01-18 15:49:08,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:49:08,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:08,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:08,373 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:08,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-01-18 15:49:08,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:49:08,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:08,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:49:08,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:08,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:08,587 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 15:49:08,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 58 [2022-01-18 15:49:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:08,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:08,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:08,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199310707] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:08,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:08,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-01-18 15:49:08,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44097444] [2022-01-18 15:49:08,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:08,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:49:08,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:08,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:49:08,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:49:08,926 INFO L87 Difference]: Start difference. First operand 4350 states and 18620 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:10,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:10,645 INFO L93 Difference]: Finished difference Result 5736 states and 24053 transitions. [2022-01-18 15:49:10,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 15:49:10,646 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:49:10,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:10,658 INFO L225 Difference]: With dead ends: 5736 [2022-01-18 15:49:10,659 INFO L226 Difference]: Without dead ends: 5686 [2022-01-18 15:49:10,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=440, Invalid=2752, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 15:49:10,659 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 416 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 1548 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 1741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 1548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:10,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 545 Invalid, 1741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 1548 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 15:49:10,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2022-01-18 15:49:10,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 4378. [2022-01-18 15:49:10,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4378 states, 4377 states have (on average 4.287183002056203) internal successors, (18765), 4377 states have internal predecessors, (18765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:10,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4378 states to 4378 states and 18765 transitions. [2022-01-18 15:49:10,742 INFO L78 Accepts]: Start accepts. Automaton has 4378 states and 18765 transitions. Word has length 23 [2022-01-18 15:49:10,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:10,742 INFO L470 AbstractCegarLoop]: Abstraction has 4378 states and 18765 transitions. [2022-01-18 15:49:10,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:10,742 INFO L276 IsEmpty]: Start isEmpty. Operand 4378 states and 18765 transitions. [2022-01-18 15:49:10,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:49:10,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:10,749 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:10,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2022-01-18 15:49:10,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:10,970 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:49:10,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:10,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1710729082, now seen corresponding path program 91 times [2022-01-18 15:49:10,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:10,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947666513] [2022-01-18 15:49:10,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:10,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:11,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:11,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:11,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947666513] [2022-01-18 15:49:11,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947666513] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:11,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306032067] [2022-01-18 15:49:11,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:49:11,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:11,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:11,137 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:11,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-01-18 15:49:11,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:11,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:49:11,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:11,337 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:11,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2022-01-18 15:49:12,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:12,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:12,618 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:12,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:49:12,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:12,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:49:12,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:12,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306032067] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:12,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:12,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:49:12,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098899239] [2022-01-18 15:49:12,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:12,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:49:12,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:12,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:49:12,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:49:12,673 INFO L87 Difference]: Start difference. First operand 4378 states and 18765 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:13,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:13,252 INFO L93 Difference]: Finished difference Result 4592 states and 19570 transitions. [2022-01-18 15:49:13,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:49:13,253 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:49:13,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:13,263 INFO L225 Difference]: With dead ends: 4592 [2022-01-18 15:49:13,263 INFO L226 Difference]: Without dead ends: 4569 [2022-01-18 15:49:13,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:49:13,263 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 127 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:13,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 450 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 945 Invalid, 0 Unknown, 38 Unchecked, 0.4s Time] [2022-01-18 15:49:13,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4569 states. [2022-01-18 15:49:13,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4569 to 4378. [2022-01-18 15:49:13,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4378 states, 4377 states have (on average 4.287183002056203) internal successors, (18765), 4377 states have internal predecessors, (18765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:13,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4378 states to 4378 states and 18765 transitions. [2022-01-18 15:49:13,378 INFO L78 Accepts]: Start accepts. Automaton has 4378 states and 18765 transitions. Word has length 23 [2022-01-18 15:49:13,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:13,378 INFO L470 AbstractCegarLoop]: Abstraction has 4378 states and 18765 transitions. [2022-01-18 15:49:13,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:13,378 INFO L276 IsEmpty]: Start isEmpty. Operand 4378 states and 18765 transitions. [2022-01-18 15:49:13,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:49:13,385 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:13,385 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:13,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2022-01-18 15:49:13,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:13,585 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:49:13,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:13,586 INFO L85 PathProgramCache]: Analyzing trace with hash 610154488, now seen corresponding path program 28 times [2022-01-18 15:49:13,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:13,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855369621] [2022-01-18 15:49:13,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:13,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:13,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:13,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:13,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:13,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855369621] [2022-01-18 15:49:13,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855369621] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:13,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801702963] [2022-01-18 15:49:13,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:49:13,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:13,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:13,706 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:13,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-01-18 15:49:13,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:49:13,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:13,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:49:13,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:13,897 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:13,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:49:14,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:14,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:14,339 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:14,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:49:14,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:14,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:49:14,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:14,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801702963] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:14,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:14,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:49:14,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301522769] [2022-01-18 15:49:14,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:14,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:49:14,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:14,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:49:14,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:49:14,399 INFO L87 Difference]: Start difference. First operand 4378 states and 18765 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:15,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:15,330 INFO L93 Difference]: Finished difference Result 5300 states and 22397 transitions. [2022-01-18 15:49:15,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:49:15,330 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:49:15,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:15,342 INFO L225 Difference]: With dead ends: 5300 [2022-01-18 15:49:15,342 INFO L226 Difference]: Without dead ends: 5276 [2022-01-18 15:49:15,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=1204, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:49:15,343 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 265 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 1486 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 1704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:15,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 651 Invalid, 1704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1486 Invalid, 0 Unknown, 162 Unchecked, 0.6s Time] [2022-01-18 15:49:15,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5276 states. [2022-01-18 15:49:15,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5276 to 4386. [2022-01-18 15:49:15,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4386 states, 4385 states have (on average 4.288027366020525) internal successors, (18803), 4385 states have internal predecessors, (18803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:15,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4386 states to 4386 states and 18803 transitions. [2022-01-18 15:49:15,413 INFO L78 Accepts]: Start accepts. Automaton has 4386 states and 18803 transitions. Word has length 23 [2022-01-18 15:49:15,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:15,413 INFO L470 AbstractCegarLoop]: Abstraction has 4386 states and 18803 transitions. [2022-01-18 15:49:15,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:15,413 INFO L276 IsEmpty]: Start isEmpty. Operand 4386 states and 18803 transitions. [2022-01-18 15:49:15,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:49:15,420 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:15,420 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:15,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2022-01-18 15:49:15,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:15,621 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:49:15,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:15,621 INFO L85 PathProgramCache]: Analyzing trace with hash -296006472, now seen corresponding path program 29 times [2022-01-18 15:49:15,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:15,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536216545] [2022-01-18 15:49:15,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:15,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:15,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:15,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:15,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:15,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536216545] [2022-01-18 15:49:15,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536216545] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:15,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510766234] [2022-01-18 15:49:15,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:49:15,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:15,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:15,754 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:15,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-01-18 15:49:15,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:49:15,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:15,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:49:15,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:15,916 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:15,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:49:16,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:16,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:16,444 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:16,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:49:16,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:16,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:49:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:16,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510766234] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:16,499 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:16,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:49:16,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011229719] [2022-01-18 15:49:16,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:16,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:49:16,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:16,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:49:16,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:49:16,500 INFO L87 Difference]: Start difference. First operand 4386 states and 18803 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:17,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:17,554 INFO L93 Difference]: Finished difference Result 5399 states and 22732 transitions. [2022-01-18 15:49:17,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:49:17,554 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:49:17,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:17,566 INFO L225 Difference]: With dead ends: 5399 [2022-01-18 15:49:17,567 INFO L226 Difference]: Without dead ends: 5343 [2022-01-18 15:49:17,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=249, Invalid=1311, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:49:17,567 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 295 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 1476 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 1776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:17,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 541 Invalid, 1776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1476 Invalid, 0 Unknown, 204 Unchecked, 0.6s Time] [2022-01-18 15:49:17,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5343 states. [2022-01-18 15:49:17,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5343 to 4398. [2022-01-18 15:49:17,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4398 states, 4397 states have (on average 4.287923584261997) internal successors, (18854), 4397 states have internal predecessors, (18854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:17,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4398 states to 4398 states and 18854 transitions. [2022-01-18 15:49:17,650 INFO L78 Accepts]: Start accepts. Automaton has 4398 states and 18854 transitions. Word has length 23 [2022-01-18 15:49:17,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:17,650 INFO L470 AbstractCegarLoop]: Abstraction has 4398 states and 18854 transitions. [2022-01-18 15:49:17,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:17,650 INFO L276 IsEmpty]: Start isEmpty. Operand 4398 states and 18854 transitions. [2022-01-18 15:49:17,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:49:17,657 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:17,657 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:17,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2022-01-18 15:49:17,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:17,858 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:49:17,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:17,858 INFO L85 PathProgramCache]: Analyzing trace with hash 779704684, now seen corresponding path program 30 times [2022-01-18 15:49:17,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:17,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58111284] [2022-01-18 15:49:17,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:17,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:17,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:17,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:17,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:17,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58111284] [2022-01-18 15:49:17,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58111284] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:17,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550164575] [2022-01-18 15:49:17,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:49:17,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:17,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:17,988 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:17,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-01-18 15:49:18,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:49:18,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:18,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:49:18,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:18,152 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:18,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:49:18,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:18,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:18,691 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:18,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:49:18,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:18,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:49:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:18,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550164575] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:18,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:18,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:49:18,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78230728] [2022-01-18 15:49:18,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:18,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:49:18,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:18,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:49:18,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:49:18,750 INFO L87 Difference]: Start difference. First operand 4398 states and 18854 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:19,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:19,751 INFO L93 Difference]: Finished difference Result 5425 states and 22856 transitions. [2022-01-18 15:49:19,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:49:19,752 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:49:19,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:19,764 INFO L225 Difference]: With dead ends: 5425 [2022-01-18 15:49:19,764 INFO L226 Difference]: Without dead ends: 5379 [2022-01-18 15:49:19,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=263, Invalid=1377, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:49:19,765 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 311 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:19,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 448 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1056 Invalid, 0 Unknown, 133 Unchecked, 0.5s Time] [2022-01-18 15:49:19,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5379 states. [2022-01-18 15:49:19,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5379 to 4388. [2022-01-18 15:49:19,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4388 states, 4387 states have (on average 4.288124002735355) internal successors, (18812), 4387 states have internal predecessors, (18812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:19,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4388 states to 4388 states and 18812 transitions. [2022-01-18 15:49:19,839 INFO L78 Accepts]: Start accepts. Automaton has 4388 states and 18812 transitions. Word has length 23 [2022-01-18 15:49:19,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:19,839 INFO L470 AbstractCegarLoop]: Abstraction has 4388 states and 18812 transitions. [2022-01-18 15:49:19,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:19,839 INFO L276 IsEmpty]: Start isEmpty. Operand 4388 states and 18812 transitions. [2022-01-18 15:49:19,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:49:19,846 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:19,846 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:19,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2022-01-18 15:49:20,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable187 [2022-01-18 15:49:20,047 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:49:20,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:20,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1032690948, now seen corresponding path program 31 times [2022-01-18 15:49:20,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:20,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927739014] [2022-01-18 15:49:20,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:20,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:20,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:20,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:20,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:20,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927739014] [2022-01-18 15:49:20,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927739014] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:20,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449186712] [2022-01-18 15:49:20,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:49:20,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:20,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:20,192 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:20,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-01-18 15:49:20,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:20,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:49:20,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:20,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:20,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:49:20,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:20,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:20,858 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:20,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:49:20,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:20,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:49:20,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:20,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449186712] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:20,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:20,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:49:20,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974410039] [2022-01-18 15:49:20,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:20,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:49:20,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:20,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:49:20,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:49:20,918 INFO L87 Difference]: Start difference. First operand 4388 states and 18812 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:22,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:22,329 INFO L93 Difference]: Finished difference Result 5671 states and 23850 transitions. [2022-01-18 15:49:22,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 15:49:22,330 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:49:22,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:22,342 INFO L225 Difference]: With dead ends: 5671 [2022-01-18 15:49:22,342 INFO L226 Difference]: Without dead ends: 5615 [2022-01-18 15:49:22,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=342, Invalid=1728, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 15:49:22,342 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 305 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 1714 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 1977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:22,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 665 Invalid, 1977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1714 Invalid, 0 Unknown, 168 Unchecked, 0.7s Time] [2022-01-18 15:49:22,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5615 states. [2022-01-18 15:49:22,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5615 to 4388. [2022-01-18 15:49:22,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4388 states, 4387 states have (on average 4.288124002735355) internal successors, (18812), 4387 states have internal predecessors, (18812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:22,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4388 states to 4388 states and 18812 transitions. [2022-01-18 15:49:22,412 INFO L78 Accepts]: Start accepts. Automaton has 4388 states and 18812 transitions. Word has length 23 [2022-01-18 15:49:22,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:22,412 INFO L470 AbstractCegarLoop]: Abstraction has 4388 states and 18812 transitions. [2022-01-18 15:49:22,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:22,412 INFO L276 IsEmpty]: Start isEmpty. Operand 4388 states and 18812 transitions. [2022-01-18 15:49:22,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:49:22,419 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:22,419 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:22,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2022-01-18 15:49:22,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-01-18 15:49:22,620 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:49:22,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:22,620 INFO L85 PathProgramCache]: Analyzing trace with hash 2108402104, now seen corresponding path program 32 times [2022-01-18 15:49:22,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:22,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107969900] [2022-01-18 15:49:22,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:22,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:22,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:22,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:22,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107969900] [2022-01-18 15:49:22,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107969900] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:22,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038716884] [2022-01-18 15:49:22,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:49:22,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:22,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:22,754 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:22,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-01-18 15:49:22,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:49:22,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:22,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:49:22,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:22,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:22,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:49:23,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:23,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:23,451 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:23,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:49:23,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:23,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:49:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:23,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038716884] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:23,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:23,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:49:23,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895835691] [2022-01-18 15:49:23,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:23,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:49:23,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:23,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:49:23,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:49:23,508 INFO L87 Difference]: Start difference. First operand 4388 states and 18812 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:24,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:24,611 INFO L93 Difference]: Finished difference Result 5417 states and 22807 transitions. [2022-01-18 15:49:24,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:49:24,611 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:49:24,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:24,624 INFO L225 Difference]: With dead ends: 5417 [2022-01-18 15:49:24,624 INFO L226 Difference]: Without dead ends: 5371 [2022-01-18 15:49:24,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=263, Invalid=1377, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:49:24,624 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 230 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 1494 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 1892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 329 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:24,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 614 Invalid, 1892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1494 Invalid, 0 Unknown, 329 Unchecked, 0.6s Time] [2022-01-18 15:49:24,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5371 states. [2022-01-18 15:49:24,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5371 to 4388. [2022-01-18 15:49:24,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4388 states, 4387 states have (on average 4.288124002735355) internal successors, (18812), 4387 states have internal predecessors, (18812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:24,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4388 states to 4388 states and 18812 transitions. [2022-01-18 15:49:24,734 INFO L78 Accepts]: Start accepts. Automaton has 4388 states and 18812 transitions. Word has length 23 [2022-01-18 15:49:24,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:24,734 INFO L470 AbstractCegarLoop]: Abstraction has 4388 states and 18812 transitions. [2022-01-18 15:49:24,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:24,734 INFO L276 IsEmpty]: Start isEmpty. Operand 4388 states and 18812 transitions. [2022-01-18 15:49:24,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:49:24,741 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:24,741 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:24,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2022-01-18 15:49:24,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-01-18 15:49:24,942 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:49:24,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:24,942 INFO L85 PathProgramCache]: Analyzing trace with hash 436075832, now seen corresponding path program 33 times [2022-01-18 15:49:24,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:24,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848990138] [2022-01-18 15:49:24,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:24,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:24,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:25,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:25,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:25,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848990138] [2022-01-18 15:49:25,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848990138] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:25,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94116878] [2022-01-18 15:49:25,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:49:25,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:25,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:25,100 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:25,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-01-18 15:49:25,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:49:25,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:25,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:49:25,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:25,292 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:25,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:49:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:25,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:25,755 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:25,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:49:25,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:25,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:49:25,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:25,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94116878] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:25,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:25,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:49:25,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696962767] [2022-01-18 15:49:25,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:25,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:49:25,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:25,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:49:25,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:49:25,811 INFO L87 Difference]: Start difference. First operand 4388 states and 18812 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:26,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:26,612 INFO L93 Difference]: Finished difference Result 4938 states and 20940 transitions. [2022-01-18 15:49:26,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:49:26,613 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:49:26,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:26,624 INFO L225 Difference]: With dead ends: 4938 [2022-01-18 15:49:26,624 INFO L226 Difference]: Without dead ends: 4904 [2022-01-18 15:49:26,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:49:26,624 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 186 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 1368 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:26,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 511 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1368 Invalid, 0 Unknown, 76 Unchecked, 0.5s Time] [2022-01-18 15:49:26,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4904 states. [2022-01-18 15:49:26,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4904 to 4409. [2022-01-18 15:49:26,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4408 states have (on average 4.286524500907441) internal successors, (18895), 4408 states have internal predecessors, (18895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:26,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 18895 transitions. [2022-01-18 15:49:26,694 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 18895 transitions. Word has length 23 [2022-01-18 15:49:26,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:26,694 INFO L470 AbstractCegarLoop]: Abstraction has 4409 states and 18895 transitions. [2022-01-18 15:49:26,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:26,694 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 18895 transitions. [2022-01-18 15:49:26,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:49:26,701 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:26,701 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:26,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2022-01-18 15:49:26,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:26,903 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:49:26,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:26,903 INFO L85 PathProgramCache]: Analyzing trace with hash -892621588, now seen corresponding path program 34 times [2022-01-18 15:49:26,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:26,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746074542] [2022-01-18 15:49:26,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:26,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:26,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:27,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:27,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746074542] [2022-01-18 15:49:27,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746074542] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:27,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532130354] [2022-01-18 15:49:27,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:49:27,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:27,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:27,027 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:27,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-01-18 15:49:27,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:49:27,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:27,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:49:27,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:27,218 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:27,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:49:27,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:27,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:27,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:27,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:49:27,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:27,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:49:27,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:27,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532130354] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:27,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:27,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:49:27,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554347708] [2022-01-18 15:49:27,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:27,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:49:27,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:27,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:49:27,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:49:27,761 INFO L87 Difference]: Start difference. First operand 4409 states and 18895 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:28,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:28,441 INFO L93 Difference]: Finished difference Result 5307 states and 22365 transitions. [2022-01-18 15:49:28,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:49:28,441 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:49:28,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:28,453 INFO L225 Difference]: With dead ends: 5307 [2022-01-18 15:49:28,453 INFO L226 Difference]: Without dead ends: 5251 [2022-01-18 15:49:28,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=1154, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:49:28,454 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 242 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:28,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 466 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1021 Invalid, 0 Unknown, 99 Unchecked, 0.4s Time] [2022-01-18 15:49:28,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5251 states. [2022-01-18 15:49:28,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5251 to 4423. [2022-01-18 15:49:28,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4423 states, 4422 states have (on average 4.287200361827227) internal successors, (18958), 4422 states have internal predecessors, (18958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:28,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4423 states to 4423 states and 18958 transitions. [2022-01-18 15:49:28,528 INFO L78 Accepts]: Start accepts. Automaton has 4423 states and 18958 transitions. Word has length 23 [2022-01-18 15:49:28,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:28,528 INFO L470 AbstractCegarLoop]: Abstraction has 4423 states and 18958 transitions. [2022-01-18 15:49:28,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:28,529 INFO L276 IsEmpty]: Start isEmpty. Operand 4423 states and 18958 transitions. [2022-01-18 15:49:28,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:49:28,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:28,536 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:28,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2022-01-18 15:49:28,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:28,738 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:49:28,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:28,738 INFO L85 PathProgramCache]: Analyzing trace with hash -304876266, now seen corresponding path program 35 times [2022-01-18 15:49:28,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:28,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667295375] [2022-01-18 15:49:28,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:28,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:28,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:28,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:28,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:28,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667295375] [2022-01-18 15:49:28,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667295375] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:28,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121407451] [2022-01-18 15:49:28,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:49:28,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:28,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:28,872 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:28,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-01-18 15:49:28,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:49:28,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:28,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:49:28,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:29,040 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:29,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:49:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:29,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:29,571 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:29,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:49:29,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:29,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:49:29,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:29,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121407451] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:29,630 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:29,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:49:29,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364262813] [2022-01-18 15:49:29,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:29,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:49:29,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:29,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:49:29,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:49:29,631 INFO L87 Difference]: Start difference. First operand 4423 states and 18958 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:30,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:30,693 INFO L93 Difference]: Finished difference Result 5201 states and 21970 transitions. [2022-01-18 15:49:30,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:49:30,694 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:49:30,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:30,705 INFO L225 Difference]: With dead ends: 5201 [2022-01-18 15:49:30,705 INFO L226 Difference]: Without dead ends: 5145 [2022-01-18 15:49:30,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=247, Invalid=1393, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:49:30,706 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 281 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 1570 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 1782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:30,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 586 Invalid, 1782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1570 Invalid, 0 Unknown, 122 Unchecked, 0.6s Time] [2022-01-18 15:49:30,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5145 states. [2022-01-18 15:49:30,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5145 to 4449. [2022-01-18 15:49:30,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4449 states, 4448 states have (on average 4.286870503597123) internal successors, (19068), 4448 states have internal predecessors, (19068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:30,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4449 states to 4449 states and 19068 transitions. [2022-01-18 15:49:30,775 INFO L78 Accepts]: Start accepts. Automaton has 4449 states and 19068 transitions. Word has length 23 [2022-01-18 15:49:30,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:30,775 INFO L470 AbstractCegarLoop]: Abstraction has 4449 states and 19068 transitions. [2022-01-18 15:49:30,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:30,776 INFO L276 IsEmpty]: Start isEmpty. Operand 4449 states and 19068 transitions. [2022-01-18 15:49:30,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:49:30,783 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:30,783 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:30,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2022-01-18 15:49:30,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:30,983 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:49:30,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:30,984 INFO L85 PathProgramCache]: Analyzing trace with hash 770834890, now seen corresponding path program 36 times [2022-01-18 15:49:30,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:30,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390230691] [2022-01-18 15:49:30,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:30,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:31,114 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:31,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:31,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390230691] [2022-01-18 15:49:31,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390230691] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:31,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405846783] [2022-01-18 15:49:31,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:49:31,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:31,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:31,116 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:31,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-01-18 15:49:31,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:49:31,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:31,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 15:49:31,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:31,302 INFO L353 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2022-01-18 15:49:31,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 47 [2022-01-18 15:49:31,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:31,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:31,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:31,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405846783] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:31,665 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:31,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-18 15:49:31,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923477655] [2022-01-18 15:49:31,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:31,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:49:31,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:31,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:49:31,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:49:31,666 INFO L87 Difference]: Start difference. First operand 4449 states and 19068 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:33,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:33,788 INFO L93 Difference]: Finished difference Result 5693 states and 23886 transitions. [2022-01-18 15:49:33,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 15:49:33,788 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:49:33,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:33,802 INFO L225 Difference]: With dead ends: 5693 [2022-01-18 15:49:33,802 INFO L226 Difference]: Without dead ends: 5639 [2022-01-18 15:49:33,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=534, Invalid=3756, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 15:49:33,802 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 464 mSDsluCounter, 1320 mSDsCounter, 0 mSdLazyCounter, 2131 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 2306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 2131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:33,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 779 Invalid, 2306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 2131 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 15:49:33,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5639 states. [2022-01-18 15:49:33,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5639 to 4447. [2022-01-18 15:49:33,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4447 states, 4446 states have (on average 4.288798920377868) internal successors, (19068), 4446 states have internal predecessors, (19068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:33,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4447 states to 4447 states and 19068 transitions. [2022-01-18 15:49:33,876 INFO L78 Accepts]: Start accepts. Automaton has 4447 states and 19068 transitions. Word has length 23 [2022-01-18 15:49:33,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:33,876 INFO L470 AbstractCegarLoop]: Abstraction has 4447 states and 19068 transitions. [2022-01-18 15:49:33,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:33,876 INFO L276 IsEmpty]: Start isEmpty. Operand 4447 states and 19068 transitions. [2022-01-18 15:49:33,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:49:33,882 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:33,883 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:33,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-01-18 15:49:34,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2022-01-18 15:49:34,083 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:49:34,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:34,083 INFO L85 PathProgramCache]: Analyzing trace with hash -473529126, now seen corresponding path program 37 times [2022-01-18 15:49:34,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:34,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640758488] [2022-01-18 15:49:34,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:34,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:34,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:34,245 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:34,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:34,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640758488] [2022-01-18 15:49:34,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640758488] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:34,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262006571] [2022-01-18 15:49:34,245 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:49:34,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:34,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:34,248 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:34,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-01-18 15:49:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:34,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:49:34,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:34,440 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:34,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 41 [2022-01-18 15:49:34,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:34,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:34,936 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:34,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:49:34,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:34,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:49:34,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:34,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262006571] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:34,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:34,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:49:34,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524262602] [2022-01-18 15:49:34,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:34,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:49:34,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:34,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:49:34,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:49:34,992 INFO L87 Difference]: Start difference. First operand 4447 states and 19068 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:36,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:36,024 INFO L93 Difference]: Finished difference Result 4889 states and 20757 transitions. [2022-01-18 15:49:36,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:49:36,024 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:49:36,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:36,035 INFO L225 Difference]: With dead ends: 4889 [2022-01-18 15:49:36,035 INFO L226 Difference]: Without dead ends: 4880 [2022-01-18 15:49:36,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:49:36,036 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 216 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:36,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 474 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 15:49:36,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4880 states. [2022-01-18 15:49:36,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4880 to 4503. [2022-01-18 15:49:36,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4503 states, 4502 states have (on average 4.290315415370946) internal successors, (19315), 4502 states have internal predecessors, (19315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:36,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4503 states to 4503 states and 19315 transitions. [2022-01-18 15:49:36,138 INFO L78 Accepts]: Start accepts. Automaton has 4503 states and 19315 transitions. Word has length 23 [2022-01-18 15:49:36,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:36,138 INFO L470 AbstractCegarLoop]: Abstraction has 4503 states and 19315 transitions. [2022-01-18 15:49:36,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:36,138 INFO L276 IsEmpty]: Start isEmpty. Operand 4503 states and 19315 transitions. [2022-01-18 15:49:36,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:49:36,145 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:36,145 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:36,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2022-01-18 15:49:36,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2022-01-18 15:49:36,346 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:49:36,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:36,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1709009540, now seen corresponding path program 38 times [2022-01-18 15:49:36,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:36,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944863762] [2022-01-18 15:49:36,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:36,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:36,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:36,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:36,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:36,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944863762] [2022-01-18 15:49:36,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944863762] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:36,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379440443] [2022-01-18 15:49:36,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:49:36,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:36,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:36,476 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:36,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-01-18 15:49:36,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:49:36,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:36,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 15:49:36,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:36,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:36,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:36,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:49:36,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2022-01-18 15:49:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:36,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:49:37,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379440443] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:37,022 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:37,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2022-01-18 15:49:37,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117966017] [2022-01-18 15:49:37,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:37,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:49:37,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:37,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:49:37,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:49:37,023 INFO L87 Difference]: Start difference. First operand 4503 states and 19315 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:38,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:38,896 INFO L93 Difference]: Finished difference Result 7306 states and 30309 transitions. [2022-01-18 15:49:38,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 15:49:38,896 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:49:38,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:38,913 INFO L225 Difference]: With dead ends: 7306 [2022-01-18 15:49:38,913 INFO L226 Difference]: Without dead ends: 7258 [2022-01-18 15:49:38,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=555, Invalid=2525, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 15:49:38,914 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 377 mSDsluCounter, 1111 mSDsCounter, 0 mSdLazyCounter, 1513 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 1728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 1513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:38,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 588 Invalid, 1728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 1513 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 15:49:38,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7258 states. [2022-01-18 15:49:39,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7258 to 4881. [2022-01-18 15:49:39,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4881 states, 4880 states have (on average 4.32172131147541) internal successors, (21090), 4880 states have internal predecessors, (21090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:39,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4881 states to 4881 states and 21090 transitions. [2022-01-18 15:49:39,040 INFO L78 Accepts]: Start accepts. Automaton has 4881 states and 21090 transitions. Word has length 23 [2022-01-18 15:49:39,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:39,040 INFO L470 AbstractCegarLoop]: Abstraction has 4881 states and 21090 transitions. [2022-01-18 15:49:39,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:39,040 INFO L276 IsEmpty]: Start isEmpty. Operand 4881 states and 21090 transitions. [2022-01-18 15:49:39,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:49:39,048 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:39,048 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:39,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2022-01-18 15:49:39,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:39,248 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:49:39,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:39,249 INFO L85 PathProgramCache]: Analyzing trace with hash 968057442, now seen corresponding path program 39 times [2022-01-18 15:49:39,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:39,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981494588] [2022-01-18 15:49:39,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:39,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:39,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:39,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:39,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:39,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981494588] [2022-01-18 15:49:39,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981494588] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:39,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126183611] [2022-01-18 15:49:39,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:49:39,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:39,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:39,386 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:39,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-01-18 15:49:39,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:49:39,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:39,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:49:39,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:39,565 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 15:49:39,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 65 [2022-01-18 15:49:39,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:39,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:40,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:40,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126183611] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:40,150 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:40,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:49:40,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725623460] [2022-01-18 15:49:40,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:40,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:49:40,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:40,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:49:40,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:49:40,151 INFO L87 Difference]: Start difference. First operand 4881 states and 21090 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:42,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:42,243 INFO L93 Difference]: Finished difference Result 6574 states and 27722 transitions. [2022-01-18 15:49:42,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 15:49:42,244 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:49:42,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:42,259 INFO L225 Difference]: With dead ends: 6574 [2022-01-18 15:49:42,259 INFO L226 Difference]: Without dead ends: 6547 [2022-01-18 15:49:42,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=548, Invalid=2874, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 15:49:42,260 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 529 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 1321 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 1934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 1321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 444 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:42,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 594 Invalid, 1934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 1321 Invalid, 0 Unknown, 444 Unchecked, 0.6s Time] [2022-01-18 15:49:42,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6547 states. [2022-01-18 15:49:42,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6547 to 5007. [2022-01-18 15:49:42,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5007 states, 5006 states have (on average 4.331002796644027) internal successors, (21681), 5006 states have internal predecessors, (21681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:42,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5007 states to 5007 states and 21681 transitions. [2022-01-18 15:49:42,385 INFO L78 Accepts]: Start accepts. Automaton has 5007 states and 21681 transitions. Word has length 23 [2022-01-18 15:49:42,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:42,385 INFO L470 AbstractCegarLoop]: Abstraction has 5007 states and 21681 transitions. [2022-01-18 15:49:42,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:42,385 INFO L276 IsEmpty]: Start isEmpty. Operand 5007 states and 21681 transitions. [2022-01-18 15:49:42,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:49:42,393 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:42,393 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:42,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2022-01-18 15:49:42,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:42,593 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:49:42,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:42,594 INFO L85 PathProgramCache]: Analyzing trace with hash 2043768598, now seen corresponding path program 40 times [2022-01-18 15:49:42,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:42,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131785177] [2022-01-18 15:49:42,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:42,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:42,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:42,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:42,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131785177] [2022-01-18 15:49:42,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131785177] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:42,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207502072] [2022-01-18 15:49:42,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:49:42,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:42,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:42,730 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:42,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-01-18 15:49:42,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:49:42,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:42,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:49:42,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:42,898 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:42,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 40 [2022-01-18 15:49:43,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:43,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:43,478 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:43,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:49:43,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:43,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:49:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:43,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207502072] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:43,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:43,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:49:43,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316855410] [2022-01-18 15:49:43,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:43,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:49:43,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:43,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:49:43,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:49:43,534 INFO L87 Difference]: Start difference. First operand 5007 states and 21681 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:45,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:45,151 INFO L93 Difference]: Finished difference Result 5635 states and 24132 transitions. [2022-01-18 15:49:45,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:49:45,151 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:49:45,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:45,207 INFO L225 Difference]: With dead ends: 5635 [2022-01-18 15:49:45,207 INFO L226 Difference]: Without dead ends: 5624 [2022-01-18 15:49:45,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:49:45,208 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 306 mSDsluCounter, 947 mSDsCounter, 0 mSdLazyCounter, 1433 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 1530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:45,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 544 Invalid, 1530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1433 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 15:49:45,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5624 states. [2022-01-18 15:49:45,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5624 to 5027. [2022-01-18 15:49:45,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5027 states, 5026 states have (on average 4.330879426979705) internal successors, (21767), 5026 states have internal predecessors, (21767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:45,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5027 states to 5027 states and 21767 transitions. [2022-01-18 15:49:45,299 INFO L78 Accepts]: Start accepts. Automaton has 5027 states and 21767 transitions. Word has length 23 [2022-01-18 15:49:45,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:45,299 INFO L470 AbstractCegarLoop]: Abstraction has 5027 states and 21767 transitions. [2022-01-18 15:49:45,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:45,299 INFO L276 IsEmpty]: Start isEmpty. Operand 5027 states and 21767 transitions. [2022-01-18 15:49:45,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:49:45,308 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:45,308 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:45,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2022-01-18 15:49:45,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:45,509 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:49:45,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:45,510 INFO L85 PathProgramCache]: Analyzing trace with hash 2085772066, now seen corresponding path program 41 times [2022-01-18 15:49:45,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:45,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752347080] [2022-01-18 15:49:45,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:45,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:45,647 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:45,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:45,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752347080] [2022-01-18 15:49:45,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752347080] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:45,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719459048] [2022-01-18 15:49:45,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:49:45,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:45,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:45,648 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:45,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-01-18 15:49:45,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:49:45,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:45,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:49:45,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:45,839 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:45,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:49:46,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:46,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:46,296 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:46,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:49:46,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:46,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:49:46,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:46,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719459048] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:46,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:46,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:49:46,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904261267] [2022-01-18 15:49:46,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:46,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:49:46,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:46,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:49:46,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:49:46,355 INFO L87 Difference]: Start difference. First operand 5027 states and 21767 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:47,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:47,424 INFO L93 Difference]: Finished difference Result 6021 states and 25718 transitions. [2022-01-18 15:49:47,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 15:49:47,424 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:49:47,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:47,439 INFO L225 Difference]: With dead ends: 6021 [2022-01-18 15:49:47,440 INFO L226 Difference]: Without dead ends: 5997 [2022-01-18 15:49:47,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=284, Invalid=1608, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 15:49:47,440 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 214 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 1715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:47,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 630 Invalid, 1715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1500 Invalid, 0 Unknown, 146 Unchecked, 0.6s Time] [2022-01-18 15:49:47,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5997 states. [2022-01-18 15:49:47,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5997 to 5045. [2022-01-18 15:49:47,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5045 states, 5044 states have (on average 4.331681205392545) internal successors, (21849), 5044 states have internal predecessors, (21849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:47,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5045 states to 5045 states and 21849 transitions. [2022-01-18 15:49:47,536 INFO L78 Accepts]: Start accepts. Automaton has 5045 states and 21849 transitions. Word has length 23 [2022-01-18 15:49:47,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:47,537 INFO L470 AbstractCegarLoop]: Abstraction has 5045 states and 21849 transitions. [2022-01-18 15:49:47,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:47,537 INFO L276 IsEmpty]: Start isEmpty. Operand 5045 states and 21849 transitions. [2022-01-18 15:49:47,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:49:47,546 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:47,546 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:47,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Forceful destruction successful, exit code 0 [2022-01-18 15:49:47,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:47,746 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:49:47,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:47,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1920563204, now seen corresponding path program 42 times [2022-01-18 15:49:47,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:47,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404700130] [2022-01-18 15:49:47,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:47,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:47,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:47,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:47,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404700130] [2022-01-18 15:49:47,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404700130] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:47,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817466390] [2022-01-18 15:49:47,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:49:47,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:47,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:47,870 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:47,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-01-18 15:49:47,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:49:47,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:47,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:49:47,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:48,049 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:48,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:49:48,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:48,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:48,523 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:48,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:49:48,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:48,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:49:48,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:48,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817466390] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:48,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:48,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:49:48,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536576564] [2022-01-18 15:49:48,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:48,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:49:48,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:48,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:49:48,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:49:48,577 INFO L87 Difference]: Start difference. First operand 5045 states and 21849 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:49,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:49,455 INFO L93 Difference]: Finished difference Result 5863 states and 25044 transitions. [2022-01-18 15:49:49,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:49:49,455 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:49:49,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:49,469 INFO L225 Difference]: With dead ends: 5863 [2022-01-18 15:49:49,469 INFO L226 Difference]: Without dead ends: 5832 [2022-01-18 15:49:49,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=214, Invalid=1192, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:49:49,470 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 220 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 1522 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:49,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 544 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1522 Invalid, 0 Unknown, 138 Unchecked, 0.6s Time] [2022-01-18 15:49:49,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5832 states. [2022-01-18 15:49:49,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5832 to 5057. [2022-01-18 15:49:49,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5057 states, 5056 states have (on average 4.332476265822785) internal successors, (21905), 5056 states have internal predecessors, (21905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:49,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5057 states to 5057 states and 21905 transitions. [2022-01-18 15:49:49,549 INFO L78 Accepts]: Start accepts. Automaton has 5057 states and 21905 transitions. Word has length 23 [2022-01-18 15:49:49,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:49,549 INFO L470 AbstractCegarLoop]: Abstraction has 5057 states and 21905 transitions. [2022-01-18 15:49:49,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:49,550 INFO L276 IsEmpty]: Start isEmpty. Operand 5057 states and 21905 transitions. [2022-01-18 15:49:49,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:49:49,558 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:49,558 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:49,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2022-01-18 15:49:49,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-01-18 15:49:49,758 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:49:49,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:49,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1911693410, now seen corresponding path program 43 times [2022-01-18 15:49:49,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:49,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412928127] [2022-01-18 15:49:49,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:49,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:49,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:49,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:49,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:49,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412928127] [2022-01-18 15:49:49,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412928127] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:49,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680507232] [2022-01-18 15:49:49,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:49:49,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:49,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:49,885 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:49,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-01-18 15:49:49,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:49,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:49:49,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:50,075 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:50,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:49:50,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:50,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:50,549 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:50,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:49:50,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:50,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:49:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:50,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680507232] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:50,610 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:50,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:49:50,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950093078] [2022-01-18 15:49:50,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:50,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:49:50,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:50,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:49:50,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:49:50,611 INFO L87 Difference]: Start difference. First operand 5057 states and 21905 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:51,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:51,389 INFO L93 Difference]: Finished difference Result 5663 states and 24251 transitions. [2022-01-18 15:49:51,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:49:51,390 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:49:51,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:51,402 INFO L225 Difference]: With dead ends: 5663 [2022-01-18 15:49:51,403 INFO L226 Difference]: Without dead ends: 5629 [2022-01-18 15:49:51,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:49:51,403 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 215 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 1446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:51,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 477 Invalid, 1446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1319 Invalid, 0 Unknown, 76 Unchecked, 0.5s Time] [2022-01-18 15:49:51,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5629 states. [2022-01-18 15:49:51,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5629 to 5069. [2022-01-18 15:49:51,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5069 states, 5068 states have (on average 4.332675611681137) internal successors, (21958), 5068 states have internal predecessors, (21958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:51,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5069 states to 5069 states and 21958 transitions. [2022-01-18 15:49:51,512 INFO L78 Accepts]: Start accepts. Automaton has 5069 states and 21958 transitions. Word has length 23 [2022-01-18 15:49:51,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:51,512 INFO L470 AbstractCegarLoop]: Abstraction has 5069 states and 21958 transitions. [2022-01-18 15:49:51,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:51,512 INFO L276 IsEmpty]: Start isEmpty. Operand 5069 states and 21958 transitions. [2022-01-18 15:49:51,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:49:51,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:51,520 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:51,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2022-01-18 15:49:51,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-01-18 15:49:51,721 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:49:51,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:51,721 INFO L85 PathProgramCache]: Analyzing trace with hash 582995990, now seen corresponding path program 44 times [2022-01-18 15:49:51,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:51,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516251384] [2022-01-18 15:49:51,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:51,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:51,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:51,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:51,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516251384] [2022-01-18 15:49:51,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516251384] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:51,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824559112] [2022-01-18 15:49:51,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:49:51,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:51,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:51,843 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:51,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-01-18 15:49:51,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:49:51,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:51,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:49:51,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:52,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:52,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:49:52,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:52,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:52,492 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:52,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:49:52,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:52,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:49:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:52,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824559112] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:52,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:52,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:49:52,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840560663] [2022-01-18 15:49:52,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:52,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:49:52,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:52,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:49:52,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:49:52,547 INFO L87 Difference]: Start difference. First operand 5069 states and 21958 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:53,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:53,373 INFO L93 Difference]: Finished difference Result 5708 states and 24447 transitions. [2022-01-18 15:49:53,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:49:53,373 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:49:53,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:53,386 INFO L225 Difference]: With dead ends: 5708 [2022-01-18 15:49:53,386 INFO L226 Difference]: Without dead ends: 5677 [2022-01-18 15:49:53,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=245, Invalid=1477, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:49:53,387 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 227 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:53,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 482 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1184 Invalid, 0 Unknown, 173 Unchecked, 0.5s Time] [2022-01-18 15:49:53,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5677 states. [2022-01-18 15:49:53,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5677 to 5069. [2022-01-18 15:49:53,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5069 states, 5068 states have (on average 4.332675611681137) internal successors, (21958), 5068 states have internal predecessors, (21958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:53,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5069 states to 5069 states and 21958 transitions. [2022-01-18 15:49:53,466 INFO L78 Accepts]: Start accepts. Automaton has 5069 states and 21958 transitions. Word has length 23 [2022-01-18 15:49:53,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:53,466 INFO L470 AbstractCegarLoop]: Abstraction has 5069 states and 21958 transitions. [2022-01-18 15:49:53,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:53,466 INFO L276 IsEmpty]: Start isEmpty. Operand 5069 states and 21958 transitions. [2022-01-18 15:49:53,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:49:53,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:53,475 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:53,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2022-01-18 15:49:53,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-01-18 15:49:53,675 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:49:53,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:53,676 INFO L85 PathProgramCache]: Analyzing trace with hash 812838358, now seen corresponding path program 45 times [2022-01-18 15:49:53,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:53,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869704482] [2022-01-18 15:49:53,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:53,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:53,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:53,796 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:53,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:53,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869704482] [2022-01-18 15:49:53,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869704482] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:53,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141832739] [2022-01-18 15:49:53,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:49:53,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:53,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:53,798 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:53,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-01-18 15:49:53,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:49:53,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:53,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:49:53,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:53,986 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:53,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:49:54,303 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:54,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:54,425 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:54,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:49:54,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:54,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:49:54,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:54,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141832739] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:54,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:54,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:49:54,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223131572] [2022-01-18 15:49:54,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:54,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:49:54,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:54,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:49:54,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:49:54,510 INFO L87 Difference]: Start difference. First operand 5069 states and 21958 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:55,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:55,416 INFO L93 Difference]: Finished difference Result 6106 states and 26076 transitions. [2022-01-18 15:49:55,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 15:49:55,416 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:49:55,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:55,430 INFO L225 Difference]: With dead ends: 6106 [2022-01-18 15:49:55,430 INFO L226 Difference]: Without dead ends: 6082 [2022-01-18 15:49:55,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 15:49:55,431 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 236 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 1226 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:55,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 532 Invalid, 1466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1226 Invalid, 0 Unknown, 188 Unchecked, 0.5s Time] [2022-01-18 15:49:55,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6082 states. [2022-01-18 15:49:55,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6082 to 5099. [2022-01-18 15:49:55,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5099 states, 5098 states have (on average 4.33562181247548) internal successors, (22103), 5098 states have internal predecessors, (22103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:55,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5099 states to 5099 states and 22103 transitions. [2022-01-18 15:49:55,515 INFO L78 Accepts]: Start accepts. Automaton has 5099 states and 22103 transitions. Word has length 23 [2022-01-18 15:49:55,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:55,515 INFO L470 AbstractCegarLoop]: Abstraction has 5099 states and 22103 transitions. [2022-01-18 15:49:55,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:55,516 INFO L276 IsEmpty]: Start isEmpty. Operand 5099 states and 22103 transitions. [2022-01-18 15:49:55,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:49:55,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:55,524 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:55,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Ended with exit code 0 [2022-01-18 15:49:55,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-01-18 15:49:55,724 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:49:55,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:55,724 INFO L85 PathProgramCache]: Analyzing trace with hash 647629496, now seen corresponding path program 46 times [2022-01-18 15:49:55,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:55,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135832562] [2022-01-18 15:49:55,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:55,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:55,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:55,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:55,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135832562] [2022-01-18 15:49:55,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135832562] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:55,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155815075] [2022-01-18 15:49:55,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:49:55,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:55,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:55,843 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:55,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-01-18 15:49:55,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:49:55,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:55,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:49:55,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:56,019 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:56,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:49:56,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:56,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:56,483 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:56,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:49:56,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:56,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:49:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:56,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155815075] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:56,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:56,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:49:56,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484372729] [2022-01-18 15:49:56,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:56,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:49:56,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:56,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:49:56,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:49:56,542 INFO L87 Difference]: Start difference. First operand 5099 states and 22103 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:57,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:57,516 INFO L93 Difference]: Finished difference Result 6008 states and 25650 transitions. [2022-01-18 15:49:57,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:49:57,516 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:49:57,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:57,531 INFO L225 Difference]: With dead ends: 6008 [2022-01-18 15:49:57,531 INFO L226 Difference]: Without dead ends: 5977 [2022-01-18 15:49:57,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=221, Invalid=1185, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:49:57,531 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 204 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 1690 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:57,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 604 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1690 Invalid, 0 Unknown, 119 Unchecked, 0.6s Time] [2022-01-18 15:49:57,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5977 states. [2022-01-18 15:49:57,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5977 to 5093. [2022-01-18 15:49:57,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5093 states, 5092 states have (on average 4.33464257659073) internal successors, (22072), 5092 states have internal predecessors, (22072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:57,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5093 states to 5093 states and 22072 transitions. [2022-01-18 15:49:57,665 INFO L78 Accepts]: Start accepts. Automaton has 5093 states and 22072 transitions. Word has length 23 [2022-01-18 15:49:57,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:57,665 INFO L470 AbstractCegarLoop]: Abstraction has 5093 states and 22072 transitions. [2022-01-18 15:49:57,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:57,665 INFO L276 IsEmpty]: Start isEmpty. Operand 5093 states and 22072 transitions. [2022-01-18 15:49:57,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:49:57,675 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:57,675 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:57,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2022-01-18 15:49:57,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2022-01-18 15:49:57,875 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:49:57,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:49:57,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1299590272, now seen corresponding path program 47 times [2022-01-18 15:49:57,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:49:57,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061834047] [2022-01-18 15:49:57,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:49:57,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:49:57,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:49:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:58,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:49:58,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061834047] [2022-01-18 15:49:58,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061834047] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:49:58,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018293243] [2022-01-18 15:49:58,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:49:58,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:49:58,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:49:58,006 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:49:58,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-01-18 15:49:58,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:49:58,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:49:58,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:49:58,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:49:58,198 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:58,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:49:58,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:58,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:49:58,637 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:49:58,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:49:58,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:49:58,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:49:58,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:49:58,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018293243] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:49:58,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:49:58,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:49:58,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609987295] [2022-01-18 15:49:58,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:49:58,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:49:58,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:49:58,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:49:58,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:49:58,696 INFO L87 Difference]: Start difference. First operand 5093 states and 22072 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:59,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:49:59,714 INFO L93 Difference]: Finished difference Result 5874 states and 25156 transitions. [2022-01-18 15:49:59,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 15:49:59,714 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:49:59,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:49:59,728 INFO L225 Difference]: With dead ends: 5874 [2022-01-18 15:49:59,728 INFO L226 Difference]: Without dead ends: 5850 [2022-01-18 15:49:59,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=260, Invalid=1546, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 15:49:59,728 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 187 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 1508 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:49:59,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 718 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1508 Invalid, 0 Unknown, 168 Unchecked, 0.6s Time] [2022-01-18 15:49:59,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5850 states. [2022-01-18 15:49:59,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5850 to 5099. [2022-01-18 15:49:59,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5099 states, 5098 states have (on average 4.334248724990192) internal successors, (22096), 5098 states have internal predecessors, (22096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:59,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5099 states to 5099 states and 22096 transitions. [2022-01-18 15:49:59,810 INFO L78 Accepts]: Start accepts. Automaton has 5099 states and 22096 transitions. Word has length 23 [2022-01-18 15:49:59,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:49:59,811 INFO L470 AbstractCegarLoop]: Abstraction has 5099 states and 22096 transitions. [2022-01-18 15:49:59,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:49:59,811 INFO L276 IsEmpty]: Start isEmpty. Operand 5099 states and 22096 transitions. [2022-01-18 15:49:59,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:49:59,819 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:49:59,819 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:49:59,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2022-01-18 15:50:00,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2022-01-18 15:50:00,019 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:50:00,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:00,019 INFO L85 PathProgramCache]: Analyzing trace with hash 2089216064, now seen corresponding path program 48 times [2022-01-18 15:50:00,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:00,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095058510] [2022-01-18 15:50:00,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:00,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:00,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:00,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:00,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:00,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095058510] [2022-01-18 15:50:00,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095058510] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:00,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127210943] [2022-01-18 15:50:00,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:50:00,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:00,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:00,148 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:00,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-01-18 15:50:00,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 15:50:00,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:00,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:50:00,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:00,353 INFO L353 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2022-01-18 15:50:00,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 74 [2022-01-18 15:50:00,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:00,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:00,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:00,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127210943] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:00,713 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:00,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2022-01-18 15:50:00,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435490487] [2022-01-18 15:50:00,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:00,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:50:00,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:00,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:50:00,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:50:00,714 INFO L87 Difference]: Start difference. First operand 5099 states and 22096 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:02,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:02,947 INFO L93 Difference]: Finished difference Result 6705 states and 28466 transitions. [2022-01-18 15:50:02,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 15:50:02,947 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:50:02,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:02,963 INFO L225 Difference]: With dead ends: 6705 [2022-01-18 15:50:02,963 INFO L226 Difference]: Without dead ends: 6647 [2022-01-18 15:50:02,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=516, Invalid=3266, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 15:50:02,963 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 460 mSDsluCounter, 1406 mSDsCounter, 0 mSdLazyCounter, 2289 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 2477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 2289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:02,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 830 Invalid, 2477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 2289 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 15:50:02,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6647 states. [2022-01-18 15:50:03,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6647 to 5243. [2022-01-18 15:50:03,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5243 states, 5242 states have (on average 4.340518885921404) internal successors, (22753), 5242 states have internal predecessors, (22753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:03,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5243 states to 5243 states and 22753 transitions. [2022-01-18 15:50:03,054 INFO L78 Accepts]: Start accepts. Automaton has 5243 states and 22753 transitions. Word has length 23 [2022-01-18 15:50:03,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:03,054 INFO L470 AbstractCegarLoop]: Abstraction has 5243 states and 22753 transitions. [2022-01-18 15:50:03,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:03,054 INFO L276 IsEmpty]: Start isEmpty. Operand 5243 states and 22753 transitions. [2022-01-18 15:50:03,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:50:03,062 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:03,063 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:03,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2022-01-18 15:50:03,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:03,263 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:50:03,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:03,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1666679604, now seen corresponding path program 49 times [2022-01-18 15:50:03,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:03,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789098557] [2022-01-18 15:50:03,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:03,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:03,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:03,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:03,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789098557] [2022-01-18 15:50:03,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789098557] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:03,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439585413] [2022-01-18 15:50:03,378 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:50:03,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:03,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:03,379 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:03,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-01-18 15:50:03,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:03,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:50:03,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:03,568 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:03,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:50:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:03,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:03,988 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:03,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:50:03,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:03,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:50:04,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:04,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439585413] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:04,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:04,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:50:04,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870842072] [2022-01-18 15:50:04,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:04,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:50:04,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:04,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:50:04,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:50:04,044 INFO L87 Difference]: Start difference. First operand 5243 states and 22753 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:04,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:04,810 INFO L93 Difference]: Finished difference Result 5786 states and 24883 transitions. [2022-01-18 15:50:04,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:50:04,811 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:50:04,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:04,823 INFO L225 Difference]: With dead ends: 5786 [2022-01-18 15:50:04,823 INFO L226 Difference]: Without dead ends: 5761 [2022-01-18 15:50:04,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:50:04,824 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 132 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 1214 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 1402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:04,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 505 Invalid, 1402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1214 Invalid, 0 Unknown, 139 Unchecked, 0.5s Time] [2022-01-18 15:50:04,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5761 states. [2022-01-18 15:50:04,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5761 to 5245. [2022-01-18 15:50:04,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5245 states, 5244 states have (on average 4.340770404271549) internal successors, (22763), 5244 states have internal predecessors, (22763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:04,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5245 states to 5245 states and 22763 transitions. [2022-01-18 15:50:04,913 INFO L78 Accepts]: Start accepts. Automaton has 5245 states and 22763 transitions. Word has length 23 [2022-01-18 15:50:04,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:04,913 INFO L470 AbstractCegarLoop]: Abstraction has 5245 states and 22763 transitions. [2022-01-18 15:50:04,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:04,913 INFO L276 IsEmpty]: Start isEmpty. Operand 5245 states and 22763 transitions. [2022-01-18 15:50:04,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:50:04,923 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:04,923 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:04,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2022-01-18 15:50:05,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2022-01-18 15:50:05,123 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:50:05,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:05,123 INFO L85 PathProgramCache]: Analyzing trace with hash -281037928, now seen corresponding path program 92 times [2022-01-18 15:50:05,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:05,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012955628] [2022-01-18 15:50:05,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:05,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:05,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:05,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:05,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:05,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012955628] [2022-01-18 15:50:05,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012955628] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:05,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733083639] [2022-01-18 15:50:05,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:50:05,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:05,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:05,251 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:05,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-01-18 15:50:05,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:50:05,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:05,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:50:05,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:05,433 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:05,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 41 [2022-01-18 15:50:05,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:05,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:05,860 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:05,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:50:05,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:05,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:50:05,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:05,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733083639] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:05,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:05,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:50:05,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110487081] [2022-01-18 15:50:05,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:05,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:50:05,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:05,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:50:05,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:50:05,911 INFO L87 Difference]: Start difference. First operand 5245 states and 22763 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:06,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:06,635 INFO L93 Difference]: Finished difference Result 5463 states and 23594 transitions. [2022-01-18 15:50:06,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:50:06,636 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:50:06,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:06,649 INFO L225 Difference]: With dead ends: 5463 [2022-01-18 15:50:06,649 INFO L226 Difference]: Without dead ends: 5448 [2022-01-18 15:50:06,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:50:06,649 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 135 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:06,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 429 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:50:06,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5448 states. [2022-01-18 15:50:06,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5448 to 5251. [2022-01-18 15:50:06,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5251 states, 5250 states have (on average 4.340952380952381) internal successors, (22790), 5250 states have internal predecessors, (22790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:06,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5251 states to 5251 states and 22790 transitions. [2022-01-18 15:50:06,735 INFO L78 Accepts]: Start accepts. Automaton has 5251 states and 22790 transitions. Word has length 23 [2022-01-18 15:50:06,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:06,735 INFO L470 AbstractCegarLoop]: Abstraction has 5251 states and 22790 transitions. [2022-01-18 15:50:06,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:06,735 INFO L276 IsEmpty]: Start isEmpty. Operand 5251 states and 22790 transitions. [2022-01-18 15:50:06,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:50:06,744 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:06,744 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:06,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forceful destruction successful, exit code 0 [2022-01-18 15:50:06,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:06,945 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:50:06,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:06,945 INFO L85 PathProgramCache]: Analyzing trace with hash -415825832, now seen corresponding path program 93 times [2022-01-18 15:50:06,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:06,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216683632] [2022-01-18 15:50:06,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:06,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:06,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:07,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:07,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:07,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216683632] [2022-01-18 15:50:07,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216683632] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:07,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065085880] [2022-01-18 15:50:07,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:50:07,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:07,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:07,071 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:07,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-01-18 15:50:07,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:50:07,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:07,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 15:50:07,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:07,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:07,298 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 15:50:07,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 50 [2022-01-18 15:50:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:07,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:07,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:07,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065085880] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:07,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:07,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:50:07,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551674203] [2022-01-18 15:50:07,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:07,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:50:07,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:07,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:50:07,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:50:07,597 INFO L87 Difference]: Start difference. First operand 5251 states and 22790 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:09,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:09,307 INFO L93 Difference]: Finished difference Result 6900 states and 29306 transitions. [2022-01-18 15:50:09,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 15:50:09,308 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:50:09,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:09,330 INFO L225 Difference]: With dead ends: 6900 [2022-01-18 15:50:09,330 INFO L226 Difference]: Without dead ends: 6863 [2022-01-18 15:50:09,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=489, Invalid=3171, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 15:50:09,331 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 381 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 1854 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 2008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:09,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 756 Invalid, 2008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1854 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 15:50:09,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6863 states. [2022-01-18 15:50:09,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6863 to 5333. [2022-01-18 15:50:09,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5333 states, 5332 states have (on average 4.346774193548387) internal successors, (23177), 5332 states have internal predecessors, (23177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:09,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5333 states to 5333 states and 23177 transitions. [2022-01-18 15:50:09,447 INFO L78 Accepts]: Start accepts. Automaton has 5333 states and 23177 transitions. Word has length 23 [2022-01-18 15:50:09,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:09,448 INFO L470 AbstractCegarLoop]: Abstraction has 5333 states and 23177 transitions. [2022-01-18 15:50:09,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:09,448 INFO L276 IsEmpty]: Start isEmpty. Operand 5333 states and 23177 transitions. [2022-01-18 15:50:09,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:50:09,457 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:09,457 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:09,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Ended with exit code 0 [2022-01-18 15:50:09,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2022-01-18 15:50:09,657 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:50:09,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:09,658 INFO L85 PathProgramCache]: Analyzing trace with hash 169508120, now seen corresponding path program 94 times [2022-01-18 15:50:09,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:09,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657479428] [2022-01-18 15:50:09,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:09,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:09,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:09,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:09,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657479428] [2022-01-18 15:50:09,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657479428] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:09,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090345179] [2022-01-18 15:50:09,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:50:09,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:09,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:09,785 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:09,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-01-18 15:50:09,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:50:09,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:09,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:50:09,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:09,953 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:09,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 40 [2022-01-18 15:50:10,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:10,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:10,492 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:10,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:50:10,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:10,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:50:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:10,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090345179] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:10,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:10,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 15:50:10,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888639580] [2022-01-18 15:50:10,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:10,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:50:10,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:10,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:50:10,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:50:10,542 INFO L87 Difference]: Start difference. First operand 5333 states and 23177 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:11,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:11,637 INFO L93 Difference]: Finished difference Result 5646 states and 24356 transitions. [2022-01-18 15:50:11,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:50:11,637 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:50:11,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:11,650 INFO L225 Difference]: With dead ends: 5646 [2022-01-18 15:50:11,650 INFO L226 Difference]: Without dead ends: 5624 [2022-01-18 15:50:11,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:50:11,651 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 178 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:11,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 437 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:50:11,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5624 states. [2022-01-18 15:50:11,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5624 to 5337. [2022-01-18 15:50:11,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5337 states, 5336 states have (on average 4.346514242878561) internal successors, (23193), 5336 states have internal predecessors, (23193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:11,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5337 states to 5337 states and 23193 transitions. [2022-01-18 15:50:11,735 INFO L78 Accepts]: Start accepts. Automaton has 5337 states and 23193 transitions. Word has length 23 [2022-01-18 15:50:11,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:11,735 INFO L470 AbstractCegarLoop]: Abstraction has 5337 states and 23193 transitions. [2022-01-18 15:50:11,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:11,736 INFO L276 IsEmpty]: Start isEmpty. Operand 5337 states and 23193 transitions. [2022-01-18 15:50:11,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:50:11,744 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:11,744 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:11,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Forceful destruction successful, exit code 0 [2022-01-18 15:50:11,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:11,945 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:50:11,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:11,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1783074854, now seen corresponding path program 95 times [2022-01-18 15:50:11,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:11,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91974871] [2022-01-18 15:50:11,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:11,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:11,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:12,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:12,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91974871] [2022-01-18 15:50:12,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91974871] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:12,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798458897] [2022-01-18 15:50:12,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:50:12,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:12,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:12,070 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:12,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-01-18 15:50:12,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:50:12,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:12,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:50:12,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:12,239 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:12,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 44 [2022-01-18 15:50:12,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:12,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:12,770 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:12,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:50:12,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:12,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:50:12,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:12,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798458897] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:12,819 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:12,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 15:50:12,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616587898] [2022-01-18 15:50:12,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:12,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:50:12,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:12,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:50:12,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:50:12,819 INFO L87 Difference]: Start difference. First operand 5337 states and 23193 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:13,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:13,943 INFO L93 Difference]: Finished difference Result 5569 states and 24061 transitions. [2022-01-18 15:50:13,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:50:13,944 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:50:13,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:13,957 INFO L225 Difference]: With dead ends: 5569 [2022-01-18 15:50:13,957 INFO L226 Difference]: Without dead ends: 5554 [2022-01-18 15:50:13,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:50:13,957 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 184 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:13,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 464 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1144 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:50:13,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5554 states. [2022-01-18 15:50:14,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5554 to 5333. [2022-01-18 15:50:14,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5333 states, 5332 states have (on average 4.346774193548387) internal successors, (23177), 5332 states have internal predecessors, (23177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:14,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5333 states to 5333 states and 23177 transitions. [2022-01-18 15:50:14,071 INFO L78 Accepts]: Start accepts. Automaton has 5333 states and 23177 transitions. Word has length 23 [2022-01-18 15:50:14,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:14,071 INFO L470 AbstractCegarLoop]: Abstraction has 5333 states and 23177 transitions. [2022-01-18 15:50:14,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:14,071 INFO L276 IsEmpty]: Start isEmpty. Operand 5333 states and 23177 transitions. [2022-01-18 15:50:14,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:50:14,080 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:14,080 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:14,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2022-01-18 15:50:14,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2022-01-18 15:50:14,280 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:50:14,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:14,281 INFO L85 PathProgramCache]: Analyzing trace with hash -261388314, now seen corresponding path program 96 times [2022-01-18 15:50:14,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:14,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030749520] [2022-01-18 15:50:14,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:14,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:14,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:14,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:14,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:14,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030749520] [2022-01-18 15:50:14,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030749520] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:14,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881373671] [2022-01-18 15:50:14,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:50:14,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:14,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:14,404 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:14,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-01-18 15:50:14,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:50:14,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:14,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:50:14,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:14,599 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:14,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 41 [2022-01-18 15:50:14,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:14,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:15,021 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:15,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:50:15,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:15,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:50:15,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:15,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881373671] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:15,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:15,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 15:50:15,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525380679] [2022-01-18 15:50:15,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:15,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:50:15,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:15,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:50:15,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:50:15,073 INFO L87 Difference]: Start difference. First operand 5333 states and 23177 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:15,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:15,885 INFO L93 Difference]: Finished difference Result 5521 states and 23883 transitions. [2022-01-18 15:50:15,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:50:15,885 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:50:15,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:15,899 INFO L225 Difference]: With dead ends: 5521 [2022-01-18 15:50:15,899 INFO L226 Difference]: Without dead ends: 5506 [2022-01-18 15:50:15,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:50:15,900 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 115 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 1112 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:15,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 469 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1112 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:50:15,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5506 states. [2022-01-18 15:50:15,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5506 to 5333. [2022-01-18 15:50:15,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5333 states, 5332 states have (on average 4.346774193548387) internal successors, (23177), 5332 states have internal predecessors, (23177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:15,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5333 states to 5333 states and 23177 transitions. [2022-01-18 15:50:15,989 INFO L78 Accepts]: Start accepts. Automaton has 5333 states and 23177 transitions. Word has length 23 [2022-01-18 15:50:15,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:15,989 INFO L470 AbstractCegarLoop]: Abstraction has 5333 states and 23177 transitions. [2022-01-18 15:50:15,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:15,990 INFO L276 IsEmpty]: Start isEmpty. Operand 5333 states and 23177 transitions. [2022-01-18 15:50:15,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:50:15,999 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:15,999 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:16,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Forceful destruction successful, exit code 0 [2022-01-18 15:50:16,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:16,199 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:50:16,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:16,200 INFO L85 PathProgramCache]: Analyzing trace with hash 402547988, now seen corresponding path program 97 times [2022-01-18 15:50:16,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:16,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95388080] [2022-01-18 15:50:16,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:16,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:16,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:16,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:16,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:16,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95388080] [2022-01-18 15:50:16,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95388080] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:16,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638990728] [2022-01-18 15:50:16,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:50:16,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:16,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:16,329 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:16,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-01-18 15:50:16,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:16,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:50:16,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:16,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:16,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:16,595 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:16,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 44 [2022-01-18 15:50:16,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:16,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:17,064 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:17,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-01-18 15:50:17,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:17,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638990728] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:17,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:17,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-18 15:50:17,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367611486] [2022-01-18 15:50:17,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:17,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:50:17,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:17,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:50:17,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:50:17,172 INFO L87 Difference]: Start difference. First operand 5333 states and 23177 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:17,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:17,487 INFO L93 Difference]: Finished difference Result 5689 states and 24556 transitions. [2022-01-18 15:50:17,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:50:17,487 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:50:17,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:17,502 INFO L225 Difference]: With dead ends: 5689 [2022-01-18 15:50:17,502 INFO L226 Difference]: Without dead ends: 5659 [2022-01-18 15:50:17,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:50:17,502 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 118 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:17,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 481 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 329 Invalid, 0 Unknown, 139 Unchecked, 0.1s Time] [2022-01-18 15:50:17,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5659 states. [2022-01-18 15:50:17,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5659 to 5353. [2022-01-18 15:50:17,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5353 states, 5352 states have (on average 4.351457399103139) internal successors, (23289), 5352 states have internal predecessors, (23289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:17,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5353 states to 5353 states and 23289 transitions. [2022-01-18 15:50:17,604 INFO L78 Accepts]: Start accepts. Automaton has 5353 states and 23289 transitions. Word has length 23 [2022-01-18 15:50:17,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:17,605 INFO L470 AbstractCegarLoop]: Abstraction has 5353 states and 23289 transitions. [2022-01-18 15:50:17,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:17,605 INFO L276 IsEmpty]: Start isEmpty. Operand 5353 states and 23289 transitions. [2022-01-18 15:50:17,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:50:17,613 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:17,614 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:17,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2022-01-18 15:50:17,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-01-18 15:50:17,814 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:50:17,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:17,814 INFO L85 PathProgramCache]: Analyzing trace with hash -19386280, now seen corresponding path program 98 times [2022-01-18 15:50:17,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:17,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053592310] [2022-01-18 15:50:17,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:17,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:17,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:17,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:17,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:17,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053592310] [2022-01-18 15:50:17,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053592310] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:17,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105776744] [2022-01-18 15:50:17,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:50:17,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:17,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:17,947 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:17,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-01-18 15:50:17,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:50:17,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:17,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:50:17,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:18,138 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:18,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 41 [2022-01-18 15:50:18,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:18,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:18,597 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:18,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:50:18,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:18,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:50:18,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:18,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105776744] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:18,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:18,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:50:18,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092860318] [2022-01-18 15:50:18,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:18,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:50:18,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:18,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:50:18,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:50:18,646 INFO L87 Difference]: Start difference. First operand 5353 states and 23289 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:19,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:19,538 INFO L93 Difference]: Finished difference Result 5643 states and 24396 transitions. [2022-01-18 15:50:19,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:50:19,538 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:50:19,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:19,552 INFO L225 Difference]: With dead ends: 5643 [2022-01-18 15:50:19,552 INFO L226 Difference]: Without dead ends: 5628 [2022-01-18 15:50:19,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:50:19,552 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 150 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:19,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 497 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1242 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:50:19,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5628 states. [2022-01-18 15:50:19,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5628 to 5363. [2022-01-18 15:50:19,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5363 states, 5362 states have (on average 4.350988437150317) internal successors, (23330), 5362 states have internal predecessors, (23330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:19,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5363 states to 5363 states and 23330 transitions. [2022-01-18 15:50:19,637 INFO L78 Accepts]: Start accepts. Automaton has 5363 states and 23330 transitions. Word has length 23 [2022-01-18 15:50:19,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:19,637 INFO L470 AbstractCegarLoop]: Abstraction has 5363 states and 23330 transitions. [2022-01-18 15:50:19,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:19,637 INFO L276 IsEmpty]: Start isEmpty. Operand 5363 states and 23330 transitions. [2022-01-18 15:50:19,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:50:19,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:19,646 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:19,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Forceful destruction successful, exit code 0 [2022-01-18 15:50:19,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-01-18 15:50:19,847 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:50:19,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:19,847 INFO L85 PathProgramCache]: Analyzing trace with hash -925547240, now seen corresponding path program 99 times [2022-01-18 15:50:19,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:19,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962746794] [2022-01-18 15:50:19,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:19,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:19,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:19,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:19,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:19,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962746794] [2022-01-18 15:50:19,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962746794] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:19,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878471088] [2022-01-18 15:50:19,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:50:19,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:19,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:19,984 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:19,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-01-18 15:50:20,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:50:20,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:20,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:50:20,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:20,154 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:20,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 40 [2022-01-18 15:50:20,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:20,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:20,756 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:20,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:50:20,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:20,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:50:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:20,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878471088] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:20,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:20,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:50:20,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32310204] [2022-01-18 15:50:20,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:20,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:50:20,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:20,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:50:20,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:50:20,808 INFO L87 Difference]: Start difference. First operand 5363 states and 23330 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:22,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:22,298 INFO L93 Difference]: Finished difference Result 5607 states and 24249 transitions. [2022-01-18 15:50:22,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:50:22,298 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:50:22,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:22,311 INFO L225 Difference]: With dead ends: 5607 [2022-01-18 15:50:22,311 INFO L226 Difference]: Without dead ends: 5586 [2022-01-18 15:50:22,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:50:22,312 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 159 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:22,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 410 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:50:22,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5586 states. [2022-01-18 15:50:22,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5586 to 5367. [2022-01-18 15:50:22,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5367 states, 5366 states have (on average 4.350726798360045) internal successors, (23346), 5366 states have internal predecessors, (23346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:22,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5367 states to 5367 states and 23346 transitions. [2022-01-18 15:50:22,394 INFO L78 Accepts]: Start accepts. Automaton has 5367 states and 23346 transitions. Word has length 23 [2022-01-18 15:50:22,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:22,394 INFO L470 AbstractCegarLoop]: Abstraction has 5367 states and 23346 transitions. [2022-01-18 15:50:22,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:22,395 INFO L276 IsEmpty]: Start isEmpty. Operand 5367 states and 23346 transitions. [2022-01-18 15:50:22,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:50:22,403 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:22,403 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:22,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Ended with exit code 0 [2022-01-18 15:50:22,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:22,604 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:50:22,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:22,604 INFO L85 PathProgramCache]: Analyzing trace with hash 150163916, now seen corresponding path program 100 times [2022-01-18 15:50:22,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:22,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886263295] [2022-01-18 15:50:22,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:22,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:22,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:22,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:22,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:22,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886263295] [2022-01-18 15:50:22,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886263295] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:22,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453568903] [2022-01-18 15:50:22,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:50:22,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:22,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:22,737 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:22,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-01-18 15:50:22,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:50:22,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:22,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:50:22,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:22,906 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:22,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 40 [2022-01-18 15:50:23,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:23,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:23,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:23,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:50:23,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:23,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:50:23,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:23,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453568903] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:23,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:23,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:50:23,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332847913] [2022-01-18 15:50:23,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:23,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:50:23,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:23,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:50:23,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:50:23,514 INFO L87 Difference]: Start difference. First operand 5367 states and 23346 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:24,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:24,593 INFO L93 Difference]: Finished difference Result 5586 states and 24173 transitions. [2022-01-18 15:50:24,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:50:24,594 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:50:24,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:24,642 INFO L225 Difference]: With dead ends: 5586 [2022-01-18 15:50:24,643 INFO L226 Difference]: Without dead ends: 5571 [2022-01-18 15:50:24,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:50:24,643 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 142 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:24,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 384 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:50:24,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5571 states. [2022-01-18 15:50:24,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5571 to 5359. [2022-01-18 15:50:24,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5359 states, 5358 states have (on average 4.350877192982456) internal successors, (23312), 5358 states have internal predecessors, (23312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:24,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5359 states to 5359 states and 23312 transitions. [2022-01-18 15:50:24,718 INFO L78 Accepts]: Start accepts. Automaton has 5359 states and 23312 transitions. Word has length 23 [2022-01-18 15:50:24,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:24,718 INFO L470 AbstractCegarLoop]: Abstraction has 5359 states and 23312 transitions. [2022-01-18 15:50:24,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:24,718 INFO L276 IsEmpty]: Start isEmpty. Operand 5359 states and 23312 transitions. [2022-01-18 15:50:24,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:50:24,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:24,726 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:24,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2022-01-18 15:50:24,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:24,927 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:50:24,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:24,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1348083700, now seen corresponding path program 101 times [2022-01-18 15:50:24,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:24,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897422717] [2022-01-18 15:50:24,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:24,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:24,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:25,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:25,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:25,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897422717] [2022-01-18 15:50:25,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897422717] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:25,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038410032] [2022-01-18 15:50:25,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:50:25,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:25,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:25,049 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:25,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-01-18 15:50:25,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:50:25,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:25,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:50:25,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:25,244 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:25,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 45 [2022-01-18 15:50:25,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:25,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:25,688 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:25,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:50:25,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:25,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:50:25,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:25,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038410032] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:25,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:25,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 15:50:25,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74537721] [2022-01-18 15:50:25,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:25,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:50:25,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:25,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:50:25,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:50:25,739 INFO L87 Difference]: Start difference. First operand 5359 states and 23312 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:26,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:26,581 INFO L93 Difference]: Finished difference Result 5577 states and 24136 transitions. [2022-01-18 15:50:26,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:50:26,582 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:50:26,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:26,594 INFO L225 Difference]: With dead ends: 5577 [2022-01-18 15:50:26,595 INFO L226 Difference]: Without dead ends: 5562 [2022-01-18 15:50:26,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:50:26,595 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 109 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:26,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 499 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1189 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:50:26,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5562 states. [2022-01-18 15:50:26,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5562 to 5359. [2022-01-18 15:50:26,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5359 states, 5358 states have (on average 4.350877192982456) internal successors, (23312), 5358 states have internal predecessors, (23312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:26,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5359 states to 5359 states and 23312 transitions. [2022-01-18 15:50:26,676 INFO L78 Accepts]: Start accepts. Automaton has 5359 states and 23312 transitions. Word has length 23 [2022-01-18 15:50:26,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:26,676 INFO L470 AbstractCegarLoop]: Abstraction has 5359 states and 23312 transitions. [2022-01-18 15:50:26,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:26,677 INFO L276 IsEmpty]: Start isEmpty. Operand 5359 states and 23312 transitions. [2022-01-18 15:50:26,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:50:26,685 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:26,685 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:26,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2022-01-18 15:50:26,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2022-01-18 15:50:26,886 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:50:26,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:26,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1894009576, now seen corresponding path program 102 times [2022-01-18 15:50:26,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:26,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622624734] [2022-01-18 15:50:26,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:26,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:26,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:27,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:27,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:27,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622624734] [2022-01-18 15:50:27,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622624734] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:27,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956323718] [2022-01-18 15:50:27,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:50:27,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:27,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:27,009 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:27,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-01-18 15:50:27,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:50:27,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:27,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:50:27,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:27,197 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:27,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:50:27,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:27,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:27,653 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:27,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:50:27,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:27,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:50:27,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:27,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956323718] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:27,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:27,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:50:27,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209873168] [2022-01-18 15:50:27,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:27,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:50:27,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:27,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:50:27,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:50:27,709 INFO L87 Difference]: Start difference. First operand 5359 states and 23312 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:28,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:28,309 INFO L93 Difference]: Finished difference Result 5606 states and 24252 transitions. [2022-01-18 15:50:28,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:50:28,309 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:50:28,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:28,325 INFO L225 Difference]: With dead ends: 5606 [2022-01-18 15:50:28,325 INFO L226 Difference]: Without dead ends: 5591 [2022-01-18 15:50:28,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:50:28,325 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 117 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:28,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 429 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 948 Invalid, 0 Unknown, 63 Unchecked, 0.4s Time] [2022-01-18 15:50:28,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5591 states. [2022-01-18 15:50:28,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5591 to 5367. [2022-01-18 15:50:28,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5367 states, 5366 states have (on average 4.350913156913903) internal successors, (23347), 5366 states have internal predecessors, (23347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:28,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5367 states to 5367 states and 23347 transitions. [2022-01-18 15:50:28,408 INFO L78 Accepts]: Start accepts. Automaton has 5367 states and 23347 transitions. Word has length 23 [2022-01-18 15:50:28,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:28,408 INFO L470 AbstractCegarLoop]: Abstraction has 5367 states and 23347 transitions. [2022-01-18 15:50:28,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:28,408 INFO L276 IsEmpty]: Start isEmpty. Operand 5367 states and 23347 transitions. [2022-01-18 15:50:28,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:50:28,417 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:28,417 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:28,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Forceful destruction successful, exit code 0 [2022-01-18 15:50:28,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2022-01-18 15:50:28,617 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:50:28,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:28,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1308675624, now seen corresponding path program 103 times [2022-01-18 15:50:28,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:28,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311957063] [2022-01-18 15:50:28,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:28,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:28,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:28,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:28,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:28,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311957063] [2022-01-18 15:50:28,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311957063] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:28,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807706689] [2022-01-18 15:50:28,740 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:50:28,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:28,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:28,741 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:28,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-01-18 15:50:28,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:28,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:50:28,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:28,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:28,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:50:29,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:29,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:29,378 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:29,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:50:29,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:29,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:50:29,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:29,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807706689] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:29,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:29,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:50:29,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843001878] [2022-01-18 15:50:29,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:29,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:50:29,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:29,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:50:29,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:50:29,429 INFO L87 Difference]: Start difference. First operand 5367 states and 23347 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:30,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:30,163 INFO L93 Difference]: Finished difference Result 5665 states and 24453 transitions. [2022-01-18 15:50:30,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:50:30,164 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:50:30,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:30,176 INFO L225 Difference]: With dead ends: 5665 [2022-01-18 15:50:30,177 INFO L226 Difference]: Without dead ends: 5617 [2022-01-18 15:50:30,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:50:30,177 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 136 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:30,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 363 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 860 Invalid, 0 Unknown, 143 Unchecked, 0.4s Time] [2022-01-18 15:50:30,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5617 states. [2022-01-18 15:50:30,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5617 to 5379. [2022-01-18 15:50:30,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5379 states, 5378 states have (on average 4.350687988099665) internal successors, (23398), 5378 states have internal predecessors, (23398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:30,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5379 states to 5379 states and 23398 transitions. [2022-01-18 15:50:30,259 INFO L78 Accepts]: Start accepts. Automaton has 5379 states and 23398 transitions. Word has length 23 [2022-01-18 15:50:30,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:30,259 INFO L470 AbstractCegarLoop]: Abstraction has 5379 states and 23398 transitions. [2022-01-18 15:50:30,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:30,260 INFO L276 IsEmpty]: Start isEmpty. Operand 5379 states and 23398 transitions. [2022-01-18 15:50:30,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:50:30,268 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:30,268 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:30,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Forceful destruction successful, exit code 0 [2022-01-18 15:50:30,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2022-01-18 15:50:30,471 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:50:30,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:30,472 INFO L85 PathProgramCache]: Analyzing trace with hash 304891110, now seen corresponding path program 104 times [2022-01-18 15:50:30,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:30,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286036638] [2022-01-18 15:50:30,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:30,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:30,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:30,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:30,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:30,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286036638] [2022-01-18 15:50:30,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286036638] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:30,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244774424] [2022-01-18 15:50:30,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:50:30,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:30,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:30,599 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:30,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-01-18 15:50:30,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:50:30,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:30,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:50:30,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:30,765 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:30,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 47 [2022-01-18 15:50:30,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:30,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:31,018 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:31,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:50:31,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:31,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:50:31,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:31,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244774424] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:31,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:31,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:50:31,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044642836] [2022-01-18 15:50:31,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:31,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:50:31,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:31,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:50:31,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:50:31,070 INFO L87 Difference]: Start difference. First operand 5379 states and 23398 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:31,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:31,896 INFO L93 Difference]: Finished difference Result 5623 states and 24330 transitions. [2022-01-18 15:50:31,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:50:31,896 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:50:31,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:31,909 INFO L225 Difference]: With dead ends: 5623 [2022-01-18 15:50:31,909 INFO L226 Difference]: Without dead ends: 5602 [2022-01-18 15:50:31,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:50:31,910 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 96 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:31,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 375 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1137 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:50:31,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5602 states. [2022-01-18 15:50:31,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5602 to 5371. [2022-01-18 15:50:31,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5371 states, 5370 states have (on average 4.350837988826815) internal successors, (23364), 5370 states have internal predecessors, (23364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:31,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5371 states to 5371 states and 23364 transitions. [2022-01-18 15:50:31,991 INFO L78 Accepts]: Start accepts. Automaton has 5371 states and 23364 transitions. Word has length 23 [2022-01-18 15:50:31,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:31,991 INFO L470 AbstractCegarLoop]: Abstraction has 5371 states and 23364 transitions. [2022-01-18 15:50:31,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:31,991 INFO L276 IsEmpty]: Start isEmpty. Operand 5371 states and 23364 transitions. [2022-01-18 15:50:32,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:50:32,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:32,000 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:32,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Forceful destruction successful, exit code 0 [2022-01-18 15:50:32,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:32,201 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:50:32,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:32,201 INFO L85 PathProgramCache]: Analyzing trace with hash -2121230956, now seen corresponding path program 105 times [2022-01-18 15:50:32,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:32,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421540700] [2022-01-18 15:50:32,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:32,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:32,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:32,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:32,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:32,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421540700] [2022-01-18 15:50:32,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421540700] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:32,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655229225] [2022-01-18 15:50:32,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:50:32,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:32,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:32,326 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:32,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-01-18 15:50:32,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:50:32,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:32,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:50:32,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:32,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:32,560 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 15:50:32,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 58 [2022-01-18 15:50:32,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:32,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:32,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:32,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655229225] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:32,889 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:32,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-18 15:50:32,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137527736] [2022-01-18 15:50:32,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:32,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:50:32,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:32,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:50:32,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:50:32,890 INFO L87 Difference]: Start difference. First operand 5371 states and 23364 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:34,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:34,660 INFO L93 Difference]: Finished difference Result 6863 states and 29208 transitions. [2022-01-18 15:50:34,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 15:50:34,660 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:50:34,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:34,677 INFO L225 Difference]: With dead ends: 6863 [2022-01-18 15:50:34,678 INFO L226 Difference]: Without dead ends: 6826 [2022-01-18 15:50:34,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=427, Invalid=2765, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 15:50:34,678 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 437 mSDsluCounter, 1220 mSDsCounter, 0 mSdLazyCounter, 1977 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 2162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:34,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 786 Invalid, 2162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1977 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 15:50:34,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6826 states. [2022-01-18 15:50:34,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6826 to 5401. [2022-01-18 15:50:34,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5401 states, 5400 states have (on average 4.357037037037037) internal successors, (23528), 5400 states have internal predecessors, (23528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:34,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5401 states to 5401 states and 23528 transitions. [2022-01-18 15:50:34,771 INFO L78 Accepts]: Start accepts. Automaton has 5401 states and 23528 transitions. Word has length 23 [2022-01-18 15:50:34,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:34,772 INFO L470 AbstractCegarLoop]: Abstraction has 5401 states and 23528 transitions. [2022-01-18 15:50:34,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:34,772 INFO L276 IsEmpty]: Start isEmpty. Operand 5401 states and 23528 transitions. [2022-01-18 15:50:34,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:50:34,780 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:34,780 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:34,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Forceful destruction successful, exit code 0 [2022-01-18 15:50:34,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2022-01-18 15:50:34,981 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:50:34,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:34,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1607704104, now seen corresponding path program 106 times [2022-01-18 15:50:34,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:34,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016182901] [2022-01-18 15:50:34,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:34,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:34,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:35,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:35,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:35,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016182901] [2022-01-18 15:50:35,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016182901] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:35,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721219289] [2022-01-18 15:50:35,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:50:35,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:35,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:35,115 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:35,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-01-18 15:50:35,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:50:35,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:35,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:50:35,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:35,281 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:35,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:50:35,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:35,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:35,820 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:35,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:50:35,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:35,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:50:35,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:35,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721219289] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:35,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:35,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:50:35,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892195884] [2022-01-18 15:50:35,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:35,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:50:35,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:35,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:50:35,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:50:35,871 INFO L87 Difference]: Start difference. First operand 5401 states and 23528 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:36,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:36,711 INFO L93 Difference]: Finished difference Result 5693 states and 24639 transitions. [2022-01-18 15:50:36,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:50:36,711 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:50:36,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:36,724 INFO L225 Difference]: With dead ends: 5693 [2022-01-18 15:50:36,724 INFO L226 Difference]: Without dead ends: 5672 [2022-01-18 15:50:36,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=245, Invalid=1237, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:50:36,724 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 169 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:36,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 376 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 980 Invalid, 0 Unknown, 191 Unchecked, 0.4s Time] [2022-01-18 15:50:36,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5672 states. [2022-01-18 15:50:36,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5672 to 5407. [2022-01-18 15:50:36,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5407 states, 5406 states have (on average 4.356455789863115) internal successors, (23551), 5406 states have internal predecessors, (23551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:36,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5407 states to 5407 states and 23551 transitions. [2022-01-18 15:50:36,809 INFO L78 Accepts]: Start accepts. Automaton has 5407 states and 23551 transitions. Word has length 23 [2022-01-18 15:50:36,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:36,809 INFO L470 AbstractCegarLoop]: Abstraction has 5407 states and 23551 transitions. [2022-01-18 15:50:36,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:36,809 INFO L276 IsEmpty]: Start isEmpty. Operand 5407 states and 23551 transitions. [2022-01-18 15:50:36,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:50:36,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:36,818 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:36,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2022-01-18 15:50:37,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2022-01-18 15:50:37,019 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:50:37,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:37,019 INFO L85 PathProgramCache]: Analyzing trace with hash -531992948, now seen corresponding path program 107 times [2022-01-18 15:50:37,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:37,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80278836] [2022-01-18 15:50:37,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:37,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:37,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:37,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:37,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:37,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80278836] [2022-01-18 15:50:37,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80278836] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:37,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542880297] [2022-01-18 15:50:37,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:50:37,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:37,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:37,151 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:37,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-01-18 15:50:37,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:50:37,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:37,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:50:37,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:37,319 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:37,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:50:37,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:37,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:37,858 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:37,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:50:37,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:37,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:50:37,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:37,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542880297] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:37,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:37,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:50:37,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480667738] [2022-01-18 15:50:37,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:37,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:50:37,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:37,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:50:37,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:50:37,912 INFO L87 Difference]: Start difference. First operand 5407 states and 23551 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:38,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:38,661 INFO L93 Difference]: Finished difference Result 5641 states and 24444 transitions. [2022-01-18 15:50:38,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:50:38,661 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:50:38,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:38,675 INFO L225 Difference]: With dead ends: 5641 [2022-01-18 15:50:38,675 INFO L226 Difference]: Without dead ends: 5626 [2022-01-18 15:50:38,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:50:38,676 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 126 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:38,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 354 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 842 Invalid, 0 Unknown, 146 Unchecked, 0.4s Time] [2022-01-18 15:50:38,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5626 states. [2022-01-18 15:50:38,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5626 to 5401. [2022-01-18 15:50:38,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5401 states, 5400 states have (on average 4.357037037037037) internal successors, (23528), 5400 states have internal predecessors, (23528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:38,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5401 states to 5401 states and 23528 transitions. [2022-01-18 15:50:38,760 INFO L78 Accepts]: Start accepts. Automaton has 5401 states and 23528 transitions. Word has length 23 [2022-01-18 15:50:38,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:38,760 INFO L470 AbstractCegarLoop]: Abstraction has 5401 states and 23528 transitions. [2022-01-18 15:50:38,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:38,760 INFO L276 IsEmpty]: Start isEmpty. Operand 5401 states and 23528 transitions. [2022-01-18 15:50:38,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:50:38,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:38,769 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:38,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2022-01-18 15:50:38,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2022-01-18 15:50:38,969 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:50:38,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:38,969 INFO L85 PathProgramCache]: Analyzing trace with hash -250997096, now seen corresponding path program 108 times [2022-01-18 15:50:38,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:38,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226192922] [2022-01-18 15:50:38,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:38,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:38,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:39,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:39,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:39,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226192922] [2022-01-18 15:50:39,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226192922] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:39,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391442835] [2022-01-18 15:50:39,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:50:39,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:39,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:39,113 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:39,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-01-18 15:50:39,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:50:39,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:39,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 15:50:39,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:39,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:39,301 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:39,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2022-01-18 15:50:39,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:39,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:39,725 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:39,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:50:39,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:39,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:50:39,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:39,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391442835] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:39,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:39,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:50:39,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577083671] [2022-01-18 15:50:39,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:39,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:50:39,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:39,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:50:39,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:50:39,774 INFO L87 Difference]: Start difference. First operand 5401 states and 23528 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:40,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:40,364 INFO L93 Difference]: Finished difference Result 5720 states and 24754 transitions. [2022-01-18 15:50:40,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:50:40,364 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:50:40,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:40,377 INFO L225 Difference]: With dead ends: 5720 [2022-01-18 15:50:40,377 INFO L226 Difference]: Without dead ends: 5698 [2022-01-18 15:50:40,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:50:40,378 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 127 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:40,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 283 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 782 Invalid, 0 Unknown, 44 Unchecked, 0.3s Time] [2022-01-18 15:50:40,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5698 states. [2022-01-18 15:50:40,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5698 to 5410. [2022-01-18 15:50:40,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5410 states, 5409 states have (on average 4.355703457200962) internal successors, (23560), 5409 states have internal predecessors, (23560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:40,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5410 states to 5410 states and 23560 transitions. [2022-01-18 15:50:40,462 INFO L78 Accepts]: Start accepts. Automaton has 5410 states and 23560 transitions. Word has length 23 [2022-01-18 15:50:40,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:40,462 INFO L470 AbstractCegarLoop]: Abstraction has 5410 states and 23560 transitions. [2022-01-18 15:50:40,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:40,462 INFO L276 IsEmpty]: Start isEmpty. Operand 5410 states and 23560 transitions. [2022-01-18 15:50:40,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:50:40,472 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:40,472 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:40,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2022-01-18 15:50:40,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2022-01-18 15:50:40,673 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:50:40,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:40,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1292573164, now seen corresponding path program 109 times [2022-01-18 15:50:40,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:40,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013499707] [2022-01-18 15:50:40,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:40,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:40,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:40,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:40,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013499707] [2022-01-18 15:50:40,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013499707] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:40,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692808431] [2022-01-18 15:50:40,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:50:40,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:40,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:40,816 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:40,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-01-18 15:50:40,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:40,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:50:40,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:40,963 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:40,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:50:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:41,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:41,687 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:41,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:50:41,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:41,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:50:41,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:41,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692808431] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:41,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:41,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:50:41,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841606477] [2022-01-18 15:50:41,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:41,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:50:41,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:41,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:50:41,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:50:41,738 INFO L87 Difference]: Start difference. First operand 5410 states and 23560 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:42,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:42,540 INFO L93 Difference]: Finished difference Result 5745 states and 24848 transitions. [2022-01-18 15:50:42,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:50:42,540 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:50:42,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:42,553 INFO L225 Difference]: With dead ends: 5745 [2022-01-18 15:50:42,553 INFO L226 Difference]: Without dead ends: 5721 [2022-01-18 15:50:42,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:50:42,554 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 145 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:42,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 301 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 821 Invalid, 0 Unknown, 212 Unchecked, 0.4s Time] [2022-01-18 15:50:42,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5721 states. [2022-01-18 15:50:42,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5721 to 5403. [2022-01-18 15:50:42,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5403 states, 5402 states have (on average 4.356904850055535) internal successors, (23536), 5402 states have internal predecessors, (23536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:42,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5403 states to 5403 states and 23536 transitions. [2022-01-18 15:50:42,638 INFO L78 Accepts]: Start accepts. Automaton has 5403 states and 23536 transitions. Word has length 23 [2022-01-18 15:50:42,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:42,638 INFO L470 AbstractCegarLoop]: Abstraction has 5403 states and 23536 transitions. [2022-01-18 15:50:42,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:42,638 INFO L276 IsEmpty]: Start isEmpty. Operand 5403 states and 23536 transitions. [2022-01-18 15:50:42,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:50:42,647 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:42,647 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:42,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Forceful destruction successful, exit code 0 [2022-01-18 15:50:42,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:42,848 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:50:42,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:42,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1579694516, now seen corresponding path program 110 times [2022-01-18 15:50:42,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:42,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529847311] [2022-01-18 15:50:42,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:42,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:42,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:43,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:43,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:43,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529847311] [2022-01-18 15:50:43,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529847311] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:43,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520288879] [2022-01-18 15:50:43,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:50:43,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:43,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:43,015 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:43,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-01-18 15:50:43,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:50:43,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:43,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:50:43,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:43,159 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:43,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:50:43,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:43,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:43,691 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:43,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:50:43,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:43,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:50:43,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:43,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520288879] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:43,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:43,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:50:43,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308110322] [2022-01-18 15:50:43,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:43,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:50:43,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:43,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:50:43,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:50:43,743 INFO L87 Difference]: Start difference. First operand 5403 states and 23536 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:44,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:44,583 INFO L93 Difference]: Finished difference Result 5813 states and 25077 transitions. [2022-01-18 15:50:44,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:50:44,583 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:50:44,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:44,597 INFO L225 Difference]: With dead ends: 5813 [2022-01-18 15:50:44,597 INFO L226 Difference]: Without dead ends: 5765 [2022-01-18 15:50:44,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=224, Invalid=1182, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:50:44,597 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 130 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:44,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 347 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 848 Invalid, 0 Unknown, 186 Unchecked, 0.4s Time] [2022-01-18 15:50:44,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5765 states. [2022-01-18 15:50:44,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5765 to 5409. [2022-01-18 15:50:44,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5409 states, 5408 states have (on average 4.356508875739645) internal successors, (23560), 5408 states have internal predecessors, (23560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:44,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5409 states to 5409 states and 23560 transitions. [2022-01-18 15:50:44,684 INFO L78 Accepts]: Start accepts. Automaton has 5409 states and 23560 transitions. Word has length 23 [2022-01-18 15:50:44,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:44,684 INFO L470 AbstractCegarLoop]: Abstraction has 5409 states and 23560 transitions. [2022-01-18 15:50:44,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:44,684 INFO L276 IsEmpty]: Start isEmpty. Operand 5409 states and 23560 transitions. [2022-01-18 15:50:44,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:50:44,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:44,692 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:44,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Forceful destruction successful, exit code 0 [2022-01-18 15:50:44,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:44,893 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:50:44,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:44,893 INFO L85 PathProgramCache]: Analyzing trace with hash -2072911902, now seen corresponding path program 111 times [2022-01-18 15:50:44,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:44,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477622613] [2022-01-18 15:50:44,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:44,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:45,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:45,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:45,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477622613] [2022-01-18 15:50:45,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477622613] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:45,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330275777] [2022-01-18 15:50:45,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:50:45,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:45,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:45,032 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:45,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-01-18 15:50:45,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:50:45,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:45,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:50:45,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:45,194 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 15:50:45,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 61 [2022-01-18 15:50:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:45,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:46,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:46,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:50:46,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:46,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2022-01-18 15:50:46,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:46,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330275777] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:46,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:46,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-01-18 15:50:46,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320826000] [2022-01-18 15:50:46,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:46,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:50:46,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:46,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:50:46,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:50:46,075 INFO L87 Difference]: Start difference. First operand 5409 states and 23560 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:48,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:48,527 INFO L93 Difference]: Finished difference Result 5963 states and 25689 transitions. [2022-01-18 15:50:48,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 15:50:48,527 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:50:48,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:48,541 INFO L225 Difference]: With dead ends: 5963 [2022-01-18 15:50:48,541 INFO L226 Difference]: Without dead ends: 5927 [2022-01-18 15:50:48,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=598, Invalid=3184, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 15:50:48,541 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 450 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 1677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 441 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:48,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 521 Invalid, 1677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1072 Invalid, 0 Unknown, 441 Unchecked, 0.5s Time] [2022-01-18 15:50:48,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5927 states. [2022-01-18 15:50:48,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5927 to 5415. [2022-01-18 15:50:48,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5415 states, 5414 states have (on average 4.357037310676025) internal successors, (23589), 5414 states have internal predecessors, (23589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:48,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5415 states to 5415 states and 23589 transitions. [2022-01-18 15:50:48,629 INFO L78 Accepts]: Start accepts. Automaton has 5415 states and 23589 transitions. Word has length 23 [2022-01-18 15:50:48,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:48,629 INFO L470 AbstractCegarLoop]: Abstraction has 5415 states and 23589 transitions. [2022-01-18 15:50:48,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:48,629 INFO L276 IsEmpty]: Start isEmpty. Operand 5415 states and 23589 transitions. [2022-01-18 15:50:48,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:50:48,638 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:48,638 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:48,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Ended with exit code 0 [2022-01-18 15:50:48,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2022-01-18 15:50:48,838 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:50:48,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:48,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1138135646, now seen corresponding path program 112 times [2022-01-18 15:50:48,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:48,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943735830] [2022-01-18 15:50:48,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:48,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:48,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:48,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:48,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:48,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943735830] [2022-01-18 15:50:48,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943735830] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:48,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104000264] [2022-01-18 15:50:48,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:50:48,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:48,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:48,983 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:48,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-01-18 15:50:49,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:50:49,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:49,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:50:49,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:49,129 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:49,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:50:49,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:49,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:49,745 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:49,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:50:49,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:49,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:50:49,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:49,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104000264] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:49,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:49,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:50:49,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518837390] [2022-01-18 15:50:49,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:49,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:50:49,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:49,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:50:49,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:50:49,796 INFO L87 Difference]: Start difference. First operand 5415 states and 23589 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:50,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:50,615 INFO L93 Difference]: Finished difference Result 5734 states and 24811 transitions. [2022-01-18 15:50:50,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:50:50,615 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:50:50,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:50,628 INFO L225 Difference]: With dead ends: 5734 [2022-01-18 15:50:50,628 INFO L226 Difference]: Without dead ends: 5713 [2022-01-18 15:50:50,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=232, Invalid=1174, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:50:50,629 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 186 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:50,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 316 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 764 Invalid, 0 Unknown, 134 Unchecked, 0.3s Time] [2022-01-18 15:50:50,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5713 states. [2022-01-18 15:50:50,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5713 to 5419. [2022-01-18 15:50:50,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5419 states, 5418 states have (on average 4.356773717238833) internal successors, (23605), 5418 states have internal predecessors, (23605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:50,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5419 states to 5419 states and 23605 transitions. [2022-01-18 15:50:50,717 INFO L78 Accepts]: Start accepts. Automaton has 5419 states and 23605 transitions. Word has length 23 [2022-01-18 15:50:50,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:50,717 INFO L470 AbstractCegarLoop]: Abstraction has 5419 states and 23605 transitions. [2022-01-18 15:50:50,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:50,717 INFO L276 IsEmpty]: Start isEmpty. Operand 5419 states and 23605 transitions. [2022-01-18 15:50:50,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:50:50,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:50,726 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:50,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Forceful destruction successful, exit code 0 [2022-01-18 15:50:50,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2022-01-18 15:50:50,926 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:50:50,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:50,927 INFO L85 PathProgramCache]: Analyzing trace with hash 2144139118, now seen corresponding path program 113 times [2022-01-18 15:50:50,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:50,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814869618] [2022-01-18 15:50:50,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:50,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:50,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:51,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:51,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:51,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814869618] [2022-01-18 15:50:51,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814869618] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:51,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381886985] [2022-01-18 15:50:51,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:50:51,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:51,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:51,075 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:51,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-01-18 15:50:51,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:50:51,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:51,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:50:51,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:51,249 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:51,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:50:51,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:51,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:51,879 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:51,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:50:51,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:51,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:50:51,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:51,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381886985] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:51,932 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:51,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:50:51,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117138857] [2022-01-18 15:50:51,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:51,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:50:51,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:51,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:50:51,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:50:51,932 INFO L87 Difference]: Start difference. First operand 5419 states and 23605 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:52,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:52,633 INFO L93 Difference]: Finished difference Result 5724 states and 24781 transitions. [2022-01-18 15:50:52,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:50:52,634 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:50:52,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:52,647 INFO L225 Difference]: With dead ends: 5724 [2022-01-18 15:50:52,647 INFO L226 Difference]: Without dead ends: 5709 [2022-01-18 15:50:52,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=188, Invalid=934, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:50:52,648 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 135 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:52,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 282 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 773 Invalid, 0 Unknown, 110 Unchecked, 0.3s Time] [2022-01-18 15:50:52,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5709 states. [2022-01-18 15:50:52,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5709 to 5415. [2022-01-18 15:50:52,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5415 states, 5414 states have (on average 4.357037310676025) internal successors, (23589), 5414 states have internal predecessors, (23589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:52,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5415 states to 5415 states and 23589 transitions. [2022-01-18 15:50:52,732 INFO L78 Accepts]: Start accepts. Automaton has 5415 states and 23589 transitions. Word has length 23 [2022-01-18 15:50:52,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:52,732 INFO L470 AbstractCegarLoop]: Abstraction has 5415 states and 23589 transitions. [2022-01-18 15:50:52,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:52,732 INFO L276 IsEmpty]: Start isEmpty. Operand 5415 states and 23589 transitions. [2022-01-18 15:50:52,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:50:52,741 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:52,741 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:52,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2022-01-18 15:50:52,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:52,941 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:50:52,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:52,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1128024012, now seen corresponding path program 114 times [2022-01-18 15:50:52,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:52,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894088894] [2022-01-18 15:50:52,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:52,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:53,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:53,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:53,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894088894] [2022-01-18 15:50:53,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894088894] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:53,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444033007] [2022-01-18 15:50:53,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:50:53,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:53,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:53,062 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:53,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-01-18 15:50:53,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:50:53,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:53,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:50:53,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:53,288 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:53,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:50:53,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:53,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:53,752 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:53,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:50:53,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:53,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:50:53,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:53,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444033007] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:53,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:53,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:50:53,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162387404] [2022-01-18 15:50:53,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:53,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:50:53,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:53,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:50:53,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:50:53,804 INFO L87 Difference]: Start difference. First operand 5415 states and 23589 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:54,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:54,476 INFO L93 Difference]: Finished difference Result 5642 states and 24448 transitions. [2022-01-18 15:50:54,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:50:54,476 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:50:54,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:54,489 INFO L225 Difference]: With dead ends: 5642 [2022-01-18 15:50:54,489 INFO L226 Difference]: Without dead ends: 5627 [2022-01-18 15:50:54,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:50:54,489 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 104 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:54,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 506 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1221 Invalid, 0 Unknown, 73 Unchecked, 0.5s Time] [2022-01-18 15:50:54,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5627 states. [2022-01-18 15:50:54,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5627 to 5423. [2022-01-18 15:50:54,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5423 states, 5422 states have (on average 4.3568793803024715) internal successors, (23623), 5422 states have internal predecessors, (23623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:54,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5423 states to 5423 states and 23623 transitions. [2022-01-18 15:50:54,573 INFO L78 Accepts]: Start accepts. Automaton has 5423 states and 23623 transitions. Word has length 23 [2022-01-18 15:50:54,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:54,573 INFO L470 AbstractCegarLoop]: Abstraction has 5423 states and 23623 transitions. [2022-01-18 15:50:54,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:54,574 INFO L276 IsEmpty]: Start isEmpty. Operand 5423 states and 23623 transitions. [2022-01-18 15:50:54,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:50:54,609 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:54,609 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:54,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Ended with exit code 0 [2022-01-18 15:50:54,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:54,810 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:50:54,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:54,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1713357964, now seen corresponding path program 115 times [2022-01-18 15:50:54,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:54,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680889065] [2022-01-18 15:50:54,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:54,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:54,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:54,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680889065] [2022-01-18 15:50:54,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680889065] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:54,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126005877] [2022-01-18 15:50:54,933 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:50:54,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:54,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:54,934 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:54,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-01-18 15:50:54,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:54,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:50:54,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:55,099 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:55,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:50:55,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:55,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:55,569 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:55,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:50:55,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:55,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:50:55,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:55,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126005877] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:55,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:55,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:50:55,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021048169] [2022-01-18 15:50:55,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:55,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:50:55,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:55,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:50:55,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:50:55,621 INFO L87 Difference]: Start difference. First operand 5423 states and 23623 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:56,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:56,396 INFO L93 Difference]: Finished difference Result 5761 states and 24874 transitions. [2022-01-18 15:50:56,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:50:56,396 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:50:56,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:56,410 INFO L225 Difference]: With dead ends: 5761 [2022-01-18 15:50:56,410 INFO L226 Difference]: Without dead ends: 5713 [2022-01-18 15:50:56,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=1012, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:50:56,410 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 122 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:56,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 488 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1131 Invalid, 0 Unknown, 99 Unchecked, 0.4s Time] [2022-01-18 15:50:56,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5713 states. [2022-01-18 15:50:56,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5713 to 5435. [2022-01-18 15:50:56,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5435 states, 5434 states have (on average 4.356459330143541) internal successors, (23673), 5434 states have internal predecessors, (23673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:56,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5435 states to 5435 states and 23673 transitions. [2022-01-18 15:50:56,494 INFO L78 Accepts]: Start accepts. Automaton has 5435 states and 23673 transitions. Word has length 23 [2022-01-18 15:50:56,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:56,494 INFO L470 AbstractCegarLoop]: Abstraction has 5435 states and 23673 transitions. [2022-01-18 15:50:56,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:56,494 INFO L276 IsEmpty]: Start isEmpty. Operand 5435 states and 23673 transitions. [2022-01-18 15:50:56,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:50:56,503 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:56,503 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:56,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Ended with exit code 0 [2022-01-18 15:50:56,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:56,703 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:50:56,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:56,704 INFO L85 PathProgramCache]: Analyzing trace with hash -968042598, now seen corresponding path program 116 times [2022-01-18 15:50:56,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:56,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060205020] [2022-01-18 15:50:56,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:56,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:56,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:56,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:56,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:56,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060205020] [2022-01-18 15:50:56,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060205020] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:56,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90508406] [2022-01-18 15:50:56,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:50:56,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:56,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:56,828 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:56,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-01-18 15:50:56,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:50:56,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:56,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:50:56,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:56,988 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:56,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 47 [2022-01-18 15:50:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:57,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:57,226 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:50:57,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:50:57,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:50:57,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:50:57,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:57,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90508406] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:57,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:57,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:50:57,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207723033] [2022-01-18 15:50:57,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:57,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:50:57,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:57,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:50:57,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:50:57,276 INFO L87 Difference]: Start difference. First operand 5435 states and 23673 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:58,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:50:58,003 INFO L93 Difference]: Finished difference Result 5675 states and 24588 transitions. [2022-01-18 15:50:58,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:50:58,003 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:50:58,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:50:58,016 INFO L225 Difference]: With dead ends: 5675 [2022-01-18 15:50:58,016 INFO L226 Difference]: Without dead ends: 5654 [2022-01-18 15:50:58,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:50:58,017 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 127 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:50:58,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 382 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:50:58,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5654 states. [2022-01-18 15:50:58,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5654 to 5423. [2022-01-18 15:50:58,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5423 states, 5422 states have (on average 4.356510512725931) internal successors, (23621), 5422 states have internal predecessors, (23621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:58,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5423 states to 5423 states and 23621 transitions. [2022-01-18 15:50:58,112 INFO L78 Accepts]: Start accepts. Automaton has 5423 states and 23621 transitions. Word has length 23 [2022-01-18 15:50:58,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:50:58,112 INFO L470 AbstractCegarLoop]: Abstraction has 5423 states and 23621 transitions. [2022-01-18 15:50:58,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:50:58,112 INFO L276 IsEmpty]: Start isEmpty. Operand 5423 states and 23621 transitions. [2022-01-18 15:50:58,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:50:58,121 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:50:58,121 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:50:58,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Ended with exit code 0 [2022-01-18 15:50:58,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:58,321 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:50:58,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:50:58,321 INFO L85 PathProgramCache]: Analyzing trace with hash -407481374, now seen corresponding path program 117 times [2022-01-18 15:50:58,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:50:58,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192197246] [2022-01-18 15:50:58,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:50:58,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:50:58,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:50:58,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:58,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:50:58,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192197246] [2022-01-18 15:50:58,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192197246] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:50:58,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453244804] [2022-01-18 15:50:58,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:50:58,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:50:58,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:50:58,473 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:50:58,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-01-18 15:50:58,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:50:58,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:50:58,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:50:58,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:50:58,729 INFO L353 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2022-01-18 15:50:58,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 48 [2022-01-18 15:50:58,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:58,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:50:59,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 15:50:59,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:50:59,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453244804] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:50:59,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:50:59,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2022-01-18 15:50:59,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838299084] [2022-01-18 15:50:59,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:50:59,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 15:50:59,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:50:59,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 15:50:59,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:50:59,059 INFO L87 Difference]: Start difference. First operand 5423 states and 23621 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:00,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:00,645 INFO L93 Difference]: Finished difference Result 6380 states and 27363 transitions. [2022-01-18 15:51:00,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 15:51:00,646 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:51:00,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:00,660 INFO L225 Difference]: With dead ends: 6380 [2022-01-18 15:51:00,660 INFO L226 Difference]: Without dead ends: 6350 [2022-01-18 15:51:00,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=464, Invalid=2728, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 15:51:00,661 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 446 mSDsluCounter, 1126 mSDsCounter, 0 mSdLazyCounter, 1543 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 1821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:00,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 773 Invalid, 1821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1543 Invalid, 0 Unknown, 44 Unchecked, 0.7s Time] [2022-01-18 15:51:00,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6350 states. [2022-01-18 15:51:00,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6350 to 5447. [2022-01-18 15:51:00,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5447 states, 5446 states have (on average 4.358060962174073) internal successors, (23734), 5446 states have internal predecessors, (23734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:00,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5447 states to 5447 states and 23734 transitions. [2022-01-18 15:51:00,753 INFO L78 Accepts]: Start accepts. Automaton has 5447 states and 23734 transitions. Word has length 23 [2022-01-18 15:51:00,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:00,753 INFO L470 AbstractCegarLoop]: Abstraction has 5447 states and 23734 transitions. [2022-01-18 15:51:00,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:00,753 INFO L276 IsEmpty]: Start isEmpty. Operand 5447 states and 23734 transitions. [2022-01-18 15:51:00,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:51:00,762 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:00,762 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:00,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Ended with exit code 0 [2022-01-18 15:51:00,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2022-01-18 15:51:00,963 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:51:00,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:00,963 INFO L85 PathProgramCache]: Analyzing trace with hash 264335778, now seen corresponding path program 118 times [2022-01-18 15:51:00,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:00,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509357381] [2022-01-18 15:51:00,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:00,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:01,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:01,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:01,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509357381] [2022-01-18 15:51:01,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509357381] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:01,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629159952] [2022-01-18 15:51:01,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:51:01,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:01,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:01,084 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:01,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-01-18 15:51:01,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:51:01,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:01,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:51:01,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:01,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:01,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:01,349 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:01,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 46 [2022-01-18 15:51:01,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:01,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:01,691 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:01,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-01-18 15:51:01,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:01,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629159952] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:01,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:01,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-18 15:51:01,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150447323] [2022-01-18 15:51:01,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:01,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:51:01,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:01,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:51:01,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:51:01,790 INFO L87 Difference]: Start difference. First operand 5447 states and 23734 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:03,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:03,910 INFO L93 Difference]: Finished difference Result 6392 states and 27451 transitions. [2022-01-18 15:51:03,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 15:51:03,910 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:51:03,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:03,925 INFO L225 Difference]: With dead ends: 6392 [2022-01-18 15:51:03,925 INFO L226 Difference]: Without dead ends: 6362 [2022-01-18 15:51:03,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 13 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=632, Invalid=2908, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 15:51:03,925 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 252 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 1975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 795 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:03,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 626 Invalid, 1975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1019 Invalid, 0 Unknown, 795 Unchecked, 0.5s Time] [2022-01-18 15:51:03,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6362 states. [2022-01-18 15:51:03,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6362 to 5481. [2022-01-18 15:51:04,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5481 states, 5480 states have (on average 4.36021897810219) internal successors, (23894), 5480 states have internal predecessors, (23894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:04,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5481 states to 5481 states and 23894 transitions. [2022-01-18 15:51:04,016 INFO L78 Accepts]: Start accepts. Automaton has 5481 states and 23894 transitions. Word has length 23 [2022-01-18 15:51:04,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:04,016 INFO L470 AbstractCegarLoop]: Abstraction has 5481 states and 23894 transitions. [2022-01-18 15:51:04,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:04,016 INFO L276 IsEmpty]: Start isEmpty. Operand 5481 states and 23894 transitions. [2022-01-18 15:51:04,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:51:04,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:04,025 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:04,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Forceful destruction successful, exit code 0 [2022-01-18 15:51:04,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:04,225 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:51:04,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:04,225 INFO L85 PathProgramCache]: Analyzing trace with hash 777862630, now seen corresponding path program 119 times [2022-01-18 15:51:04,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:04,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287441661] [2022-01-18 15:51:04,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:04,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:04,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:04,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:04,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:04,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287441661] [2022-01-18 15:51:04,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287441661] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:04,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238378833] [2022-01-18 15:51:04,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:51:04,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:04,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:04,392 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:04,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-01-18 15:51:04,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:51:04,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:04,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:51:04,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:04,604 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:04,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:51:04,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:04,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:05,142 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:05,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:51:05,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:05,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:51:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:05,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238378833] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:05,197 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:05,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:51:05,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648296068] [2022-01-18 15:51:05,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:05,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:51:05,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:05,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:51:05,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:51:05,198 INFO L87 Difference]: Start difference. First operand 5481 states and 23894 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:05,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:05,978 INFO L93 Difference]: Finished difference Result 5733 states and 24834 transitions. [2022-01-18 15:51:05,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:51:05,978 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:51:05,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:05,991 INFO L225 Difference]: With dead ends: 5733 [2022-01-18 15:51:05,991 INFO L226 Difference]: Without dead ends: 5712 [2022-01-18 15:51:05,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=247, Invalid=1235, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:51:05,992 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 178 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:05,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 335 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 765 Invalid, 0 Unknown, 120 Unchecked, 0.3s Time] [2022-01-18 15:51:05,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5712 states. [2022-01-18 15:51:06,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5712 to 5485. [2022-01-18 15:51:06,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5485 states, 5484 states have (on average 4.3599562363238515) internal successors, (23910), 5484 states have internal predecessors, (23910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:06,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5485 states to 5485 states and 23910 transitions. [2022-01-18 15:51:06,078 INFO L78 Accepts]: Start accepts. Automaton has 5485 states and 23910 transitions. Word has length 23 [2022-01-18 15:51:06,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:06,078 INFO L470 AbstractCegarLoop]: Abstraction has 5485 states and 23910 transitions. [2022-01-18 15:51:06,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:06,078 INFO L276 IsEmpty]: Start isEmpty. Operand 5485 states and 23910 transitions. [2022-01-18 15:51:06,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:51:06,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:06,087 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:06,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Forceful destruction successful, exit code 0 [2022-01-18 15:51:06,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2022-01-18 15:51:06,288 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:51:06,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:06,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1853573786, now seen corresponding path program 120 times [2022-01-18 15:51:06,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:06,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871158408] [2022-01-18 15:51:06,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:06,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:06,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:06,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:06,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:06,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871158408] [2022-01-18 15:51:06,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871158408] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:06,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770420582] [2022-01-18 15:51:06,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:51:06,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:06,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:06,430 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:06,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-01-18 15:51:06,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:51:06,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:06,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:51:06,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:06,604 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:06,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 52 [2022-01-18 15:51:06,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:06,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:06,916 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:06,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:51:06,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:06,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:51:06,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:06,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770420582] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:06,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:06,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:51:06,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992509019] [2022-01-18 15:51:06,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:06,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:51:06,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:06,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:51:06,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:51:06,964 INFO L87 Difference]: Start difference. First operand 5485 states and 23910 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:08,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:08,802 INFO L93 Difference]: Finished difference Result 5674 states and 24614 transitions. [2022-01-18 15:51:08,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:51:08,802 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:51:08,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:08,815 INFO L225 Difference]: With dead ends: 5674 [2022-01-18 15:51:08,815 INFO L226 Difference]: Without dead ends: 5659 [2022-01-18 15:51:08,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=179, Invalid=875, Unknown=2, NotChecked=0, Total=1056 [2022-01-18 15:51:08,815 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 138 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:08,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 280 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 661 Invalid, 0 Unknown, 204 Unchecked, 0.3s Time] [2022-01-18 15:51:08,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5659 states. [2022-01-18 15:51:08,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5659 to 5481. [2022-01-18 15:51:08,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5481 states, 5480 states have (on average 4.36021897810219) internal successors, (23894), 5480 states have internal predecessors, (23894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:08,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5481 states to 5481 states and 23894 transitions. [2022-01-18 15:51:08,899 INFO L78 Accepts]: Start accepts. Automaton has 5481 states and 23894 transitions. Word has length 23 [2022-01-18 15:51:08,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:08,899 INFO L470 AbstractCegarLoop]: Abstraction has 5481 states and 23894 transitions. [2022-01-18 15:51:08,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:08,899 INFO L276 IsEmpty]: Start isEmpty. Operand 5481 states and 23894 transitions. [2022-01-18 15:51:08,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:51:08,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:08,908 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:08,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Ended with exit code 0 [2022-01-18 15:51:09,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2022-01-18 15:51:09,108 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:51:09,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:09,109 INFO L85 PathProgramCache]: Analyzing trace with hash 2024388718, now seen corresponding path program 121 times [2022-01-18 15:51:09,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:09,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43178241] [2022-01-18 15:51:09,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:09,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:09,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:09,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:09,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:09,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43178241] [2022-01-18 15:51:09,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43178241] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:09,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196776562] [2022-01-18 15:51:09,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:51:09,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:09,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:09,227 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:09,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-01-18 15:51:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:09,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:51:09,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:09,411 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:09,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:51:09,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:09,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:09,850 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:09,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:51:09,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:09,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:51:09,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:09,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196776562] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:09,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:09,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:51:09,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112566112] [2022-01-18 15:51:09,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:09,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:51:09,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:09,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:51:09,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:51:09,901 INFO L87 Difference]: Start difference. First operand 5481 states and 23894 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:10,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:10,627 INFO L93 Difference]: Finished difference Result 5683 states and 24653 transitions. [2022-01-18 15:51:10,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:51:10,627 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:51:10,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:10,641 INFO L225 Difference]: With dead ends: 5683 [2022-01-18 15:51:10,641 INFO L226 Difference]: Without dead ends: 5668 [2022-01-18 15:51:10,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=692, Unknown=1, NotChecked=0, Total=812 [2022-01-18 15:51:10,641 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 110 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:10,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 373 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 834 Invalid, 0 Unknown, 125 Unchecked, 0.3s Time] [2022-01-18 15:51:10,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5668 states. [2022-01-18 15:51:10,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5668 to 5481. [2022-01-18 15:51:10,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5481 states, 5480 states have (on average 4.36021897810219) internal successors, (23894), 5480 states have internal predecessors, (23894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:10,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5481 states to 5481 states and 23894 transitions. [2022-01-18 15:51:10,724 INFO L78 Accepts]: Start accepts. Automaton has 5481 states and 23894 transitions. Word has length 23 [2022-01-18 15:51:10,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:10,724 INFO L470 AbstractCegarLoop]: Abstraction has 5481 states and 23894 transitions. [2022-01-18 15:51:10,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:10,724 INFO L276 IsEmpty]: Start isEmpty. Operand 5481 states and 23894 transitions. [2022-01-18 15:51:10,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:51:10,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:10,733 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:10,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Ended with exit code 0 [2022-01-18 15:51:10,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2022-01-18 15:51:10,934 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:51:10,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:10,934 INFO L85 PathProgramCache]: Analyzing trace with hash 920138636, now seen corresponding path program 122 times [2022-01-18 15:51:10,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:10,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292985560] [2022-01-18 15:51:10,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:10,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:10,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:11,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:11,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:11,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292985560] [2022-01-18 15:51:11,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292985560] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:11,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096598922] [2022-01-18 15:51:11,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:51:11,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:11,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:11,062 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:11,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-01-18 15:51:11,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:51:11,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:11,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:51:11,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:11,248 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:11,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 45 [2022-01-18 15:51:11,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:11,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:11,683 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:11,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:51:11,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:11,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:51:11,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:11,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096598922] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:11,735 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:11,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 15:51:11,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325573561] [2022-01-18 15:51:11,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:11,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:51:11,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:11,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:51:11,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:51:11,735 INFO L87 Difference]: Start difference. First operand 5481 states and 23894 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:12,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:12,651 INFO L93 Difference]: Finished difference Result 5767 states and 24987 transitions. [2022-01-18 15:51:12,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:51:12,651 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:51:12,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:12,664 INFO L225 Difference]: With dead ends: 5767 [2022-01-18 15:51:12,665 INFO L226 Difference]: Without dead ends: 5752 [2022-01-18 15:51:12,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:51:12,665 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 145 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 1222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:12,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 500 Invalid, 1222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:51:12,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5752 states. [2022-01-18 15:51:12,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5752 to 5482. [2022-01-18 15:51:12,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5482 states, 5481 states have (on average 4.35978835978836) internal successors, (23896), 5481 states have internal predecessors, (23896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:12,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5482 states to 5482 states and 23896 transitions. [2022-01-18 15:51:12,751 INFO L78 Accepts]: Start accepts. Automaton has 5482 states and 23896 transitions. Word has length 23 [2022-01-18 15:51:12,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:12,751 INFO L470 AbstractCegarLoop]: Abstraction has 5482 states and 23896 transitions. [2022-01-18 15:51:12,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:12,751 INFO L276 IsEmpty]: Start isEmpty. Operand 5482 states and 23896 transitions. [2022-01-18 15:51:12,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:51:12,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:12,760 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:12,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Ended with exit code 0 [2022-01-18 15:51:12,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:12,960 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:51:12,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:12,961 INFO L85 PathProgramCache]: Analyzing trace with hash 498204368, now seen corresponding path program 123 times [2022-01-18 15:51:12,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:12,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992238971] [2022-01-18 15:51:12,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:12,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:13,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:13,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:13,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992238971] [2022-01-18 15:51:13,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992238971] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:13,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744990867] [2022-01-18 15:51:13,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:51:13,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:13,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:13,097 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:13,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-01-18 15:51:13,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:51:13,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:13,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:51:13,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:13,289 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:13,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 41 [2022-01-18 15:51:13,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:13,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:13,753 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:13,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:51:13,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:13,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:51:13,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:13,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744990867] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:13,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:13,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:51:13,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764778836] [2022-01-18 15:51:13,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:13,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:51:13,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:13,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:51:13,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:51:13,805 INFO L87 Difference]: Start difference. First operand 5482 states and 23896 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:15,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:15,076 INFO L93 Difference]: Finished difference Result 5892 states and 25483 transitions. [2022-01-18 15:51:15,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:51:15,076 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:51:15,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:15,090 INFO L225 Difference]: With dead ends: 5892 [2022-01-18 15:51:15,090 INFO L226 Difference]: Without dead ends: 5877 [2022-01-18 15:51:15,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:51:15,090 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 171 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 1646 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:15,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 641 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1646 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 15:51:15,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5877 states. [2022-01-18 15:51:15,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5877 to 5486. [2022-01-18 15:51:15,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5486 states, 5485 states have (on average 4.359890610756609) internal successors, (23914), 5485 states have internal predecessors, (23914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:15,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5486 states to 5486 states and 23914 transitions. [2022-01-18 15:51:15,176 INFO L78 Accepts]: Start accepts. Automaton has 5486 states and 23914 transitions. Word has length 23 [2022-01-18 15:51:15,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:15,176 INFO L470 AbstractCegarLoop]: Abstraction has 5486 states and 23914 transitions. [2022-01-18 15:51:15,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:15,176 INFO L276 IsEmpty]: Start isEmpty. Operand 5486 states and 23914 transitions. [2022-01-18 15:51:15,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:51:15,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:15,185 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:15,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Forceful destruction successful, exit code 0 [2022-01-18 15:51:15,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:15,385 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:51:15,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:15,385 INFO L85 PathProgramCache]: Analyzing trace with hash -407956592, now seen corresponding path program 124 times [2022-01-18 15:51:15,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:15,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891965740] [2022-01-18 15:51:15,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:15,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:15,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:15,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:15,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891965740] [2022-01-18 15:51:15,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891965740] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:15,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089976932] [2022-01-18 15:51:15,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:51:15,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:15,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:15,560 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:15,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-01-18 15:51:15,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:51:15,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:15,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:51:15,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:15,778 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:15,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 40 [2022-01-18 15:51:16,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:16,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:16,351 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:16,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:51:16,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:16,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:51:16,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:16,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089976932] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:16,404 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:16,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:51:16,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526715496] [2022-01-18 15:51:16,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:16,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:51:16,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:16,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:51:16,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:51:16,404 INFO L87 Difference]: Start difference. First operand 5486 states and 23914 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:18,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:18,074 INFO L93 Difference]: Finished difference Result 5812 states and 25151 transitions. [2022-01-18 15:51:18,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:51:18,074 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:51:18,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:18,092 INFO L225 Difference]: With dead ends: 5812 [2022-01-18 15:51:18,092 INFO L226 Difference]: Without dead ends: 5791 [2022-01-18 15:51:18,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:51:18,093 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 207 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:18,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 437 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:51:18,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5791 states. [2022-01-18 15:51:18,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5791 to 5498. [2022-01-18 15:51:18,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5498 states, 5497 states have (on average 4.3594688011642715) internal successors, (23964), 5497 states have internal predecessors, (23964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:18,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5498 states to 5498 states and 23964 transitions. [2022-01-18 15:51:18,184 INFO L78 Accepts]: Start accepts. Automaton has 5498 states and 23964 transitions. Word has length 23 [2022-01-18 15:51:18,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:18,185 INFO L470 AbstractCegarLoop]: Abstraction has 5498 states and 23964 transitions. [2022-01-18 15:51:18,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:18,185 INFO L276 IsEmpty]: Start isEmpty. Operand 5498 states and 23964 transitions. [2022-01-18 15:51:18,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:51:18,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:18,194 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:18,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Ended with exit code 0 [2022-01-18 15:51:18,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:18,394 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:51:18,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:18,394 INFO L85 PathProgramCache]: Analyzing trace with hash 667754564, now seen corresponding path program 125 times [2022-01-18 15:51:18,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:18,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376043163] [2022-01-18 15:51:18,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:18,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:18,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:18,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:18,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376043163] [2022-01-18 15:51:18,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376043163] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:18,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823320133] [2022-01-18 15:51:18,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:51:18,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:18,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:18,532 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:18,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-01-18 15:51:18,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:51:18,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:18,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:51:18,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:18,704 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:18,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 40 [2022-01-18 15:51:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:19,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:19,261 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:19,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:51:19,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:19,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:51:19,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:19,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823320133] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:19,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:19,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:51:19,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966021232] [2022-01-18 15:51:19,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:19,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:51:19,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:19,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:51:19,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:51:19,318 INFO L87 Difference]: Start difference. First operand 5498 states and 23964 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:20,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:20,920 INFO L93 Difference]: Finished difference Result 5854 states and 25320 transitions. [2022-01-18 15:51:20,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 15:51:20,920 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:51:20,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:20,934 INFO L225 Difference]: With dead ends: 5854 [2022-01-18 15:51:20,934 INFO L226 Difference]: Without dead ends: 5839 [2022-01-18 15:51:20,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=332, Invalid=1648, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 15:51:20,934 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 204 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:20,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 457 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1165 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:51:20,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5839 states. [2022-01-18 15:51:21,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5839 to 5490. [2022-01-18 15:51:21,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5490 states, 5489 states have (on average 4.3596283476043) internal successors, (23930), 5489 states have internal predecessors, (23930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:21,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5490 states to 5490 states and 23930 transitions. [2022-01-18 15:51:21,020 INFO L78 Accepts]: Start accepts. Automaton has 5490 states and 23930 transitions. Word has length 23 [2022-01-18 15:51:21,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:21,020 INFO L470 AbstractCegarLoop]: Abstraction has 5490 states and 23930 transitions. [2022-01-18 15:51:21,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:21,020 INFO L276 IsEmpty]: Start isEmpty. Operand 5490 states and 23930 transitions. [2022-01-18 15:51:21,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:51:21,029 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:21,029 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:21,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Ended with exit code 0 [2022-01-18 15:51:21,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:21,230 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:51:21,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:21,230 INFO L85 PathProgramCache]: Analyzing trace with hash -830493052, now seen corresponding path program 126 times [2022-01-18 15:51:21,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:21,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035570327] [2022-01-18 15:51:21,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:21,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:21,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:21,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:21,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035570327] [2022-01-18 15:51:21,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035570327] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:21,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424175911] [2022-01-18 15:51:21,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:51:21,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:21,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:21,352 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:21,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-01-18 15:51:21,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:51:21,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:21,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 15:51:21,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:21,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:21,565 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:21,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 48 [2022-01-18 15:51:21,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:21,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:21,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:21,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424175911] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:21,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:21,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-01-18 15:51:21,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415878193] [2022-01-18 15:51:21,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:21,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:51:21,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:21,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:51:21,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:51:21,901 INFO L87 Difference]: Start difference. First operand 5490 states and 23930 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:23,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:23,561 INFO L93 Difference]: Finished difference Result 6838 states and 29219 transitions. [2022-01-18 15:51:23,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 15:51:23,561 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:51:23,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:23,577 INFO L225 Difference]: With dead ends: 6838 [2022-01-18 15:51:23,577 INFO L226 Difference]: Without dead ends: 6800 [2022-01-18 15:51:23,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=444, Invalid=2862, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 15:51:23,578 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 378 mSDsluCounter, 1223 mSDsCounter, 0 mSdLazyCounter, 1953 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 2125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:23,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 811 Invalid, 2125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1953 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 15:51:23,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6800 states. [2022-01-18 15:51:23,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6800 to 5520. [2022-01-18 15:51:23,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5520 states, 5519 states have (on average 4.362022105453886) internal successors, (24074), 5519 states have internal predecessors, (24074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:23,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5520 states to 5520 states and 24074 transitions. [2022-01-18 15:51:23,670 INFO L78 Accepts]: Start accepts. Automaton has 5520 states and 24074 transitions. Word has length 23 [2022-01-18 15:51:23,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:23,670 INFO L470 AbstractCegarLoop]: Abstraction has 5520 states and 24074 transitions. [2022-01-18 15:51:23,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:23,670 INFO L276 IsEmpty]: Start isEmpty. Operand 5520 states and 24074 transitions. [2022-01-18 15:51:23,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:51:23,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:23,679 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:23,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Ended with exit code 0 [2022-01-18 15:51:23,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:23,880 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:51:23,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:23,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1586307978, now seen corresponding path program 127 times [2022-01-18 15:51:23,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:23,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137418521] [2022-01-18 15:51:23,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:23,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:23,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:24,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:24,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:24,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137418521] [2022-01-18 15:51:24,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137418521] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:24,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966246859] [2022-01-18 15:51:24,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:51:24,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:24,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:24,011 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:24,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-01-18 15:51:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:24,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:51:24,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:24,187 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:24,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:51:24,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:24,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:24,665 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:24,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:51:24,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:24,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:51:24,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:24,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966246859] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:24,715 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:24,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:51:24,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025902039] [2022-01-18 15:51:24,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:24,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:51:24,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:24,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:51:24,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:51:24,716 INFO L87 Difference]: Start difference. First operand 5520 states and 24074 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:25,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:25,704 INFO L93 Difference]: Finished difference Result 6026 states and 26014 transitions. [2022-01-18 15:51:25,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:51:25,704 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:51:25,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:25,718 INFO L225 Difference]: With dead ends: 6026 [2022-01-18 15:51:25,718 INFO L226 Difference]: Without dead ends: 6001 [2022-01-18 15:51:25,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=237, Invalid=1169, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:51:25,718 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 214 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 1314 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 1639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 251 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:25,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 598 Invalid, 1639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1314 Invalid, 0 Unknown, 251 Unchecked, 0.5s Time] [2022-01-18 15:51:25,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6001 states. [2022-01-18 15:51:25,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6001 to 5530. [2022-01-18 15:51:25,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5530 states, 5529 states have (on average 4.361548200397902) internal successors, (24115), 5529 states have internal predecessors, (24115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:25,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5530 states to 5530 states and 24115 transitions. [2022-01-18 15:51:25,805 INFO L78 Accepts]: Start accepts. Automaton has 5530 states and 24115 transitions. Word has length 23 [2022-01-18 15:51:25,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:25,805 INFO L470 AbstractCegarLoop]: Abstraction has 5530 states and 24115 transitions. [2022-01-18 15:51:25,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:25,806 INFO L276 IsEmpty]: Start isEmpty. Operand 5530 states and 24115 transitions. [2022-01-18 15:51:25,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:51:25,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:25,814 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:25,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Ended with exit code 0 [2022-01-18 15:51:26,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:26,015 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:51:26,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:26,015 INFO L85 PathProgramCache]: Analyzing trace with hash -510596822, now seen corresponding path program 128 times [2022-01-18 15:51:26,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:26,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469698216] [2022-01-18 15:51:26,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:26,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:26,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:26,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:26,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469698216] [2022-01-18 15:51:26,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469698216] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:26,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866890281] [2022-01-18 15:51:26,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:51:26,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:26,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:26,148 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:26,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-01-18 15:51:26,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:51:26,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:26,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:51:26,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:26,305 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:26,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:51:26,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:26,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:26,834 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:26,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:51:26,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:26,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:51:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:26,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866890281] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:26,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:26,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:51:26,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75734496] [2022-01-18 15:51:26,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:26,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:51:26,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:26,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:51:26,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:51:26,888 INFO L87 Difference]: Start difference. First operand 5530 states and 24115 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:27,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:27,689 INFO L93 Difference]: Finished difference Result 6004 states and 25935 transitions. [2022-01-18 15:51:27,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:51:27,690 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:51:27,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:27,704 INFO L225 Difference]: With dead ends: 6004 [2022-01-18 15:51:27,704 INFO L226 Difference]: Without dead ends: 5983 [2022-01-18 15:51:27,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:51:27,704 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 242 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:27,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 476 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 980 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2022-01-18 15:51:27,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5983 states. [2022-01-18 15:51:27,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5983 to 5526. [2022-01-18 15:51:27,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5526 states, 5525 states have (on average 4.3618099547511315) internal successors, (24099), 5525 states have internal predecessors, (24099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:27,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5526 states to 5526 states and 24099 transitions. [2022-01-18 15:51:27,832 INFO L78 Accepts]: Start accepts. Automaton has 5526 states and 24099 transitions. Word has length 23 [2022-01-18 15:51:27,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:27,832 INFO L470 AbstractCegarLoop]: Abstraction has 5526 states and 24099 transitions. [2022-01-18 15:51:27,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:27,832 INFO L276 IsEmpty]: Start isEmpty. Operand 5526 states and 24099 transitions. [2022-01-18 15:51:27,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:51:27,841 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:27,841 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:27,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Ended with exit code 0 [2022-01-18 15:51:28,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:28,041 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:51:28,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:28,042 INFO L85 PathProgramCache]: Analyzing trace with hash -845355880, now seen corresponding path program 129 times [2022-01-18 15:51:28,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:28,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977052217] [2022-01-18 15:51:28,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:28,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:28,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:28,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:28,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:28,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977052217] [2022-01-18 15:51:28,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977052217] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:28,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962573759] [2022-01-18 15:51:28,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:51:28,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:28,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:28,169 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:28,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-01-18 15:51:28,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:51:28,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:28,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 15:51:28,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:28,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:28,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 30 [2022-01-18 15:51:28,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:28,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:28,646 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:28,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:51:28,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:28,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:51:28,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:28,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962573759] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:28,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:28,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:51:28,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314100611] [2022-01-18 15:51:28,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:28,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:51:28,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:28,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:51:28,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:51:28,699 INFO L87 Difference]: Start difference. First operand 5526 states and 24099 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:29,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:29,369 INFO L93 Difference]: Finished difference Result 6182 states and 26624 transitions. [2022-01-18 15:51:29,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:51:29,369 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:51:29,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:29,383 INFO L225 Difference]: With dead ends: 6182 [2022-01-18 15:51:29,383 INFO L226 Difference]: Without dead ends: 6151 [2022-01-18 15:51:29,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:51:29,383 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 168 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:29,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 567 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1199 Invalid, 0 Unknown, 171 Unchecked, 0.5s Time] [2022-01-18 15:51:29,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6151 states. [2022-01-18 15:51:29,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6151 to 5530. [2022-01-18 15:51:29,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5530 states, 5529 states have (on average 4.361909929462833) internal successors, (24117), 5529 states have internal predecessors, (24117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:29,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5530 states to 5530 states and 24117 transitions. [2022-01-18 15:51:29,472 INFO L78 Accepts]: Start accepts. Automaton has 5530 states and 24117 transitions. Word has length 23 [2022-01-18 15:51:29,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:29,472 INFO L470 AbstractCegarLoop]: Abstraction has 5530 states and 24117 transitions. [2022-01-18 15:51:29,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:29,472 INFO L276 IsEmpty]: Start isEmpty. Operand 5530 states and 24117 transitions. [2022-01-18 15:51:29,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:51:29,481 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:29,481 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:29,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Ended with exit code 0 [2022-01-18 15:51:29,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2022-01-18 15:51:29,682 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:51:29,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:29,682 INFO L85 PathProgramCache]: Analyzing trace with hash -257610558, now seen corresponding path program 130 times [2022-01-18 15:51:29,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:29,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157771754] [2022-01-18 15:51:29,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:29,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:29,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:29,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:29,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:29,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157771754] [2022-01-18 15:51:29,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157771754] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:29,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471849945] [2022-01-18 15:51:29,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:51:29,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:29,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:29,811 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:29,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-01-18 15:51:29,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:51:29,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:29,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:51:29,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:29,964 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:29,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:51:30,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:30,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:30,451 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:30,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:51:30,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:30,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:51:30,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:30,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471849945] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:30,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:30,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:51:30,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779872302] [2022-01-18 15:51:30,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:30,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:51:30,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:30,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:51:30,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:51:30,504 INFO L87 Difference]: Start difference. First operand 5530 states and 24117 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:31,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:31,452 INFO L93 Difference]: Finished difference Result 6041 states and 26076 transitions. [2022-01-18 15:51:31,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:51:31,452 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:51:31,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:31,466 INFO L225 Difference]: With dead ends: 6041 [2022-01-18 15:51:31,466 INFO L226 Difference]: Without dead ends: 6016 [2022-01-18 15:51:31,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=248, Invalid=1312, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:51:31,467 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 234 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:31,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 528 Invalid, 1421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1165 Invalid, 0 Unknown, 168 Unchecked, 0.5s Time] [2022-01-18 15:51:31,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6016 states. [2022-01-18 15:51:31,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6016 to 5534. [2022-01-18 15:51:31,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5534 states, 5533 states have (on average 4.361648292065787) internal successors, (24133), 5533 states have internal predecessors, (24133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:31,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5534 states to 5534 states and 24133 transitions. [2022-01-18 15:51:31,587 INFO L78 Accepts]: Start accepts. Automaton has 5534 states and 24133 transitions. Word has length 23 [2022-01-18 15:51:31,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:31,587 INFO L470 AbstractCegarLoop]: Abstraction has 5534 states and 24133 transitions. [2022-01-18 15:51:31,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:31,587 INFO L276 IsEmpty]: Start isEmpty. Operand 5534 states and 24133 transitions. [2022-01-18 15:51:31,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:51:31,596 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:31,596 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:31,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Ended with exit code 0 [2022-01-18 15:51:31,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2022-01-18 15:51:31,796 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:51:31,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:31,797 INFO L85 PathProgramCache]: Analyzing trace with hash 818100598, now seen corresponding path program 131 times [2022-01-18 15:51:31,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:31,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375936629] [2022-01-18 15:51:31,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:31,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:31,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:31,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375936629] [2022-01-18 15:51:31,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375936629] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:31,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112279041] [2022-01-18 15:51:31,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:51:31,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:31,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:31,928 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:31,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-01-18 15:51:31,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:51:31,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:31,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:51:31,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:32,084 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:32,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 55 [2022-01-18 15:51:32,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:32,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:32,340 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:32,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:51:32,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:32,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:51:32,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:32,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112279041] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:32,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:32,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:51:32,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293749178] [2022-01-18 15:51:32,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:32,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:51:32,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:32,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:51:32,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:51:32,389 INFO L87 Difference]: Start difference. First operand 5534 states and 24133 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:34,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:34,706 INFO L93 Difference]: Finished difference Result 6001 states and 25913 transitions. [2022-01-18 15:51:34,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:51:34,706 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:51:34,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:34,720 INFO L225 Difference]: With dead ends: 6001 [2022-01-18 15:51:34,720 INFO L226 Difference]: Without dead ends: 5980 [2022-01-18 15:51:34,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=180, Invalid=808, Unknown=4, NotChecked=0, Total=992 [2022-01-18 15:51:34,721 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 145 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 343 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:34,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 397 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 759 Invalid, 0 Unknown, 343 Unchecked, 0.3s Time] [2022-01-18 15:51:34,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5980 states. [2022-01-18 15:51:34,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5980 to 5526. [2022-01-18 15:51:34,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5526 states, 5525 states have (on average 4.3618099547511315) internal successors, (24099), 5525 states have internal predecessors, (24099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:34,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5526 states to 5526 states and 24099 transitions. [2022-01-18 15:51:34,808 INFO L78 Accepts]: Start accepts. Automaton has 5526 states and 24099 transitions. Word has length 23 [2022-01-18 15:51:34,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:34,809 INFO L470 AbstractCegarLoop]: Abstraction has 5526 states and 24099 transitions. [2022-01-18 15:51:34,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:34,809 INFO L276 IsEmpty]: Start isEmpty. Operand 5526 states and 24099 transitions. [2022-01-18 15:51:34,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:51:34,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:34,818 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:34,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Ended with exit code 0 [2022-01-18 15:51:35,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2022-01-18 15:51:35,018 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:51:35,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:35,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1502391648, now seen corresponding path program 132 times [2022-01-18 15:51:35,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:35,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976628534] [2022-01-18 15:51:35,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:35,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:35,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:35,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:35,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976628534] [2022-01-18 15:51:35,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976628534] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:35,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520961418] [2022-01-18 15:51:35,138 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:51:35,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:35,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:35,139 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:35,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-01-18 15:51:35,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:51:35,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:35,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 15:51:35,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:35,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:35,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-01-18 15:51:35,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:35,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:35,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:51:35,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520961418] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:35,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:35,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 7] total 21 [2022-01-18 15:51:35,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996934659] [2022-01-18 15:51:35,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:35,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:51:35,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:35,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:51:35,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:51:35,663 INFO L87 Difference]: Start difference. First operand 5526 states and 24099 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:36,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:36,745 INFO L93 Difference]: Finished difference Result 7708 states and 32789 transitions. [2022-01-18 15:51:36,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 15:51:36,746 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:51:36,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:36,764 INFO L225 Difference]: With dead ends: 7708 [2022-01-18 15:51:36,764 INFO L226 Difference]: Without dead ends: 7659 [2022-01-18 15:51:36,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=333, Invalid=1473, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 15:51:36,764 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 246 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 1112 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 1112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:36,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 422 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 1112 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 15:51:36,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7659 states. [2022-01-18 15:51:36,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7659 to 5584. [2022-01-18 15:51:36,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5584 states, 5583 states have (on average 4.357334766254702) internal successors, (24327), 5583 states have internal predecessors, (24327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:36,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5584 states to 5584 states and 24327 transitions. [2022-01-18 15:51:36,896 INFO L78 Accepts]: Start accepts. Automaton has 5584 states and 24327 transitions. Word has length 23 [2022-01-18 15:51:36,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:36,896 INFO L470 AbstractCegarLoop]: Abstraction has 5584 states and 24327 transitions. [2022-01-18 15:51:36,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:36,896 INFO L276 IsEmpty]: Start isEmpty. Operand 5584 states and 24327 transitions. [2022-01-18 15:51:36,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:51:36,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:36,905 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:36,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Forceful destruction successful, exit code 0 [2022-01-18 15:51:37,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:37,106 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:51:37,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:37,106 INFO L85 PathProgramCache]: Analyzing trace with hash 596230688, now seen corresponding path program 133 times [2022-01-18 15:51:37,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:37,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977783552] [2022-01-18 15:51:37,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:37,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:37,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:37,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:37,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:37,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977783552] [2022-01-18 15:51:37,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977783552] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:37,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035538683] [2022-01-18 15:51:37,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:51:37,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:37,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:37,239 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:37,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-01-18 15:51:37,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:37,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:51:37,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:37,403 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:37,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:51:37,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:37,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:37,907 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:37,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:51:37,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:37,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:51:37,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:37,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035538683] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:37,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:37,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:51:37,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678414650] [2022-01-18 15:51:37,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:37,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:51:37,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:37,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:51:37,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:51:37,960 INFO L87 Difference]: Start difference. First operand 5584 states and 24327 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:38,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:38,725 INFO L93 Difference]: Finished difference Result 5914 states and 25571 transitions. [2022-01-18 15:51:38,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:51:38,725 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:51:38,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:38,738 INFO L225 Difference]: With dead ends: 5914 [2022-01-18 15:51:38,739 INFO L226 Difference]: Without dead ends: 5889 [2022-01-18 15:51:38,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=179, Invalid=1011, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:51:38,739 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 191 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 1321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:38,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 449 Invalid, 1321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1028 Invalid, 0 Unknown, 221 Unchecked, 0.4s Time] [2022-01-18 15:51:38,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5889 states. [2022-01-18 15:51:38,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5889 to 5592. [2022-01-18 15:51:38,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5592 states, 5591 states have (on average 4.357181184045788) internal successors, (24361), 5591 states have internal predecessors, (24361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:38,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5592 states to 5592 states and 24361 transitions. [2022-01-18 15:51:38,825 INFO L78 Accepts]: Start accepts. Automaton has 5592 states and 24361 transitions. Word has length 23 [2022-01-18 15:51:38,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:38,825 INFO L470 AbstractCegarLoop]: Abstraction has 5592 states and 24361 transitions. [2022-01-18 15:51:38,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:38,825 INFO L276 IsEmpty]: Start isEmpty. Operand 5592 states and 24361 transitions. [2022-01-18 15:51:38,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:51:38,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:38,834 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:38,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Ended with exit code 0 [2022-01-18 15:51:39,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2022-01-18 15:51:39,035 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:51:39,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:39,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1671941844, now seen corresponding path program 134 times [2022-01-18 15:51:39,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:39,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774190725] [2022-01-18 15:51:39,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:39,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:39,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:39,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:39,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774190725] [2022-01-18 15:51:39,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774190725] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:39,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793724490] [2022-01-18 15:51:39,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:51:39,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:39,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:39,197 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:39,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-01-18 15:51:39,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:51:39,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:39,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:51:39,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:39,362 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:39,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:51:39,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:39,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:39,912 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:39,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:51:39,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:39,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:51:39,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:39,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793724490] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:39,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:39,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:51:39,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685720863] [2022-01-18 15:51:39,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:39,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:51:39,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:39,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:51:39,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:51:39,966 INFO L87 Difference]: Start difference. First operand 5592 states and 24361 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:40,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:40,889 INFO L93 Difference]: Finished difference Result 5908 states and 25552 transitions. [2022-01-18 15:51:40,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:51:40,889 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:51:40,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:40,903 INFO L225 Difference]: With dead ends: 5908 [2022-01-18 15:51:40,903 INFO L226 Difference]: Without dead ends: 5887 [2022-01-18 15:51:40,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:51:40,904 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 169 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 1344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:40,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 500 Invalid, 1344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1228 Invalid, 0 Unknown, 47 Unchecked, 0.5s Time] [2022-01-18 15:51:40,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5887 states. [2022-01-18 15:51:40,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5887 to 5584. [2022-01-18 15:51:40,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5584 states, 5583 states have (on average 4.357334766254702) internal successors, (24327), 5583 states have internal predecessors, (24327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:40,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5584 states to 5584 states and 24327 transitions. [2022-01-18 15:51:40,994 INFO L78 Accepts]: Start accepts. Automaton has 5584 states and 24327 transitions. Word has length 23 [2022-01-18 15:51:40,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:40,994 INFO L470 AbstractCegarLoop]: Abstraction has 5584 states and 24327 transitions. [2022-01-18 15:51:40,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:40,994 INFO L276 IsEmpty]: Start isEmpty. Operand 5584 states and 24327 transitions. [2022-01-18 15:51:41,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:51:41,003 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:41,003 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:41,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Ended with exit code 0 [2022-01-18 15:51:41,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2022-01-18 15:51:41,203 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:51:41,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:41,203 INFO L85 PathProgramCache]: Analyzing trace with hash 148954170, now seen corresponding path program 135 times [2022-01-18 15:51:41,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:41,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597881099] [2022-01-18 15:51:41,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:41,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:41,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:41,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:41,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:41,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597881099] [2022-01-18 15:51:41,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597881099] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:41,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649941551] [2022-01-18 15:51:41,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:51:41,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:41,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:41,338 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:41,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-01-18 15:51:41,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:51:41,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:41,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 15:51:41,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:41,578 INFO L353 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2022-01-18 15:51:41,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 74 [2022-01-18 15:51:41,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:41,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:41,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:41,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649941551] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:41,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:41,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:51:41,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006317783] [2022-01-18 15:51:41,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:41,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:51:41,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:41,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:51:41,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:51:41,906 INFO L87 Difference]: Start difference. First operand 5584 states and 24327 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:44,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:44,299 INFO L93 Difference]: Finished difference Result 7546 states and 32160 transitions. [2022-01-18 15:51:44,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-18 15:51:44,300 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:51:44,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:44,318 INFO L225 Difference]: With dead ends: 7546 [2022-01-18 15:51:44,318 INFO L226 Difference]: Without dead ends: 7493 [2022-01-18 15:51:44,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1270 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=564, Invalid=4266, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 15:51:44,319 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 429 mSDsluCounter, 1326 mSDsCounter, 0 mSdLazyCounter, 2289 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 2490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 2289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:44,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 884 Invalid, 2490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 2289 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 15:51:44,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7493 states. [2022-01-18 15:51:44,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7493 to 5616. [2022-01-18 15:51:44,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5616 states, 5615 states have (on average 4.364737310774711) internal successors, (24508), 5615 states have internal predecessors, (24508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:44,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5616 states to 5616 states and 24508 transitions. [2022-01-18 15:51:44,475 INFO L78 Accepts]: Start accepts. Automaton has 5616 states and 24508 transitions. Word has length 23 [2022-01-18 15:51:44,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:44,475 INFO L470 AbstractCegarLoop]: Abstraction has 5616 states and 24508 transitions. [2022-01-18 15:51:44,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:44,475 INFO L276 IsEmpty]: Start isEmpty. Operand 5616 states and 24508 transitions. [2022-01-18 15:51:44,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:51:44,484 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:44,484 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:44,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Ended with exit code 0 [2022-01-18 15:51:44,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:44,685 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:51:44,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:44,685 INFO L85 PathProgramCache]: Analyzing trace with hash -78267210, now seen corresponding path program 136 times [2022-01-18 15:51:44,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:44,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278049338] [2022-01-18 15:51:44,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:44,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:44,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:44,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:44,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:44,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278049338] [2022-01-18 15:51:44,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278049338] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:44,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745523385] [2022-01-18 15:51:44,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:51:44,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:44,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:44,810 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:44,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-01-18 15:51:44,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:51:44,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:44,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:51:44,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:45,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:45,087 INFO L353 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2022-01-18 15:51:45,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 74 [2022-01-18 15:51:45,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:45,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:45,596 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:45,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-01-18 15:51:45,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:45,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745523385] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:45,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:45,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-18 15:51:45,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606053544] [2022-01-18 15:51:45,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:45,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:51:45,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:45,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:51:45,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:51:45,697 INFO L87 Difference]: Start difference. First operand 5616 states and 24508 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:49,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:49,053 INFO L93 Difference]: Finished difference Result 8739 states and 36768 transitions. [2022-01-18 15:51:49,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-18 15:51:49,053 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:51:49,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:49,075 INFO L225 Difference]: With dead ends: 8739 [2022-01-18 15:51:49,075 INFO L226 Difference]: Without dead ends: 8683 [2022-01-18 15:51:49,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 32 SyntacticMatches, 10 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1838 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=864, Invalid=5142, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 15:51:49,076 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 383 mSDsluCounter, 1723 mSDsCounter, 0 mSdLazyCounter, 3042 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 3775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 3042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 438 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:49,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 1213 Invalid, 3775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 3042 Invalid, 0 Unknown, 438 Unchecked, 1.4s Time] [2022-01-18 15:51:49,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8683 states. [2022-01-18 15:51:49,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8683 to 5662. [2022-01-18 15:51:49,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5662 states, 5661 states have (on average 4.368132838721074) internal successors, (24728), 5661 states have internal predecessors, (24728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:49,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5662 states to 5662 states and 24728 transitions. [2022-01-18 15:51:49,222 INFO L78 Accepts]: Start accepts. Automaton has 5662 states and 24728 transitions. Word has length 23 [2022-01-18 15:51:49,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:49,222 INFO L470 AbstractCegarLoop]: Abstraction has 5662 states and 24728 transitions. [2022-01-18 15:51:49,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:49,222 INFO L276 IsEmpty]: Start isEmpty. Operand 5662 states and 24728 transitions. [2022-01-18 15:51:49,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:51:49,231 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:49,231 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:49,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Forceful destruction successful, exit code 0 [2022-01-18 15:51:49,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:49,432 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:51:49,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:49,432 INFO L85 PathProgramCache]: Analyzing trace with hash 435259642, now seen corresponding path program 137 times [2022-01-18 15:51:49,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:49,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912751253] [2022-01-18 15:51:49,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:49,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:49,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:49,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:49,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:49,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912751253] [2022-01-18 15:51:49,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912751253] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:49,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846616995] [2022-01-18 15:51:49,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:51:49,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:49,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:49,604 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:49,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-01-18 15:51:49,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:51:49,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:49,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:51:49,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:49,772 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:49,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:51:50,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:50,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:50,283 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:50,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:51:50,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:50,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:51:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:50,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846616995] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:50,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:50,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:51:50,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368919547] [2022-01-18 15:51:50,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:50,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:51:50,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:50,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:51:50,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:51:50,340 INFO L87 Difference]: Start difference. First operand 5662 states and 24728 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:51,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:51,364 INFO L93 Difference]: Finished difference Result 6161 states and 26636 transitions. [2022-01-18 15:51:51,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 15:51:51,364 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:51:51,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:51,378 INFO L225 Difference]: With dead ends: 6161 [2022-01-18 15:51:51,379 INFO L226 Difference]: Without dead ends: 6136 [2022-01-18 15:51:51,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=309, Invalid=1671, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 15:51:51,379 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 200 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:51,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 418 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1035 Invalid, 0 Unknown, 155 Unchecked, 0.4s Time] [2022-01-18 15:51:51,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6136 states. [2022-01-18 15:51:51,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6136 to 5670. [2022-01-18 15:51:51,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5670 states, 5669 states have (on average 4.3679661315928735) internal successors, (24762), 5669 states have internal predecessors, (24762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:51,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5670 states to 5670 states and 24762 transitions. [2022-01-18 15:51:51,469 INFO L78 Accepts]: Start accepts. Automaton has 5670 states and 24762 transitions. Word has length 23 [2022-01-18 15:51:51,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:51,469 INFO L470 AbstractCegarLoop]: Abstraction has 5670 states and 24762 transitions. [2022-01-18 15:51:51,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:51,470 INFO L276 IsEmpty]: Start isEmpty. Operand 5670 states and 24762 transitions. [2022-01-18 15:51:51,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:51:51,479 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:51,479 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:51,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Ended with exit code 0 [2022-01-18 15:51:51,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:51,679 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:51:51,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:51,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1510970798, now seen corresponding path program 138 times [2022-01-18 15:51:51,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:51,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210693233] [2022-01-18 15:51:51,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:51,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:51,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:51,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:51,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210693233] [2022-01-18 15:51:51,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210693233] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:51,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43749425] [2022-01-18 15:51:51,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:51:51,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:51,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:51,818 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:51,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-01-18 15:51:51,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:51:51,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:51,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:51:51,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:51,986 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:51,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:51:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:52,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:52,542 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:52,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:51:52,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:52,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:51:52,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:52,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43749425] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:52,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:52,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:51:52,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027644231] [2022-01-18 15:51:52,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:52,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:51:52,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:52,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:51:52,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:51:52,595 INFO L87 Difference]: Start difference. First operand 5670 states and 24762 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:53,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:53,622 INFO L93 Difference]: Finished difference Result 6094 states and 26390 transitions. [2022-01-18 15:51:53,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:51:53,622 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:51:53,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:53,636 INFO L225 Difference]: With dead ends: 6094 [2022-01-18 15:51:53,637 INFO L226 Difference]: Without dead ends: 6073 [2022-01-18 15:51:53,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=259, Invalid=1381, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:51:53,637 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 178 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 1230 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:53,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 472 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1230 Invalid, 0 Unknown, 65 Unchecked, 0.5s Time] [2022-01-18 15:51:53,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6073 states. [2022-01-18 15:51:53,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6073 to 5662. [2022-01-18 15:51:53,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5662 states, 5661 states have (on average 4.368132838721074) internal successors, (24728), 5661 states have internal predecessors, (24728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:53,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5662 states to 5662 states and 24728 transitions. [2022-01-18 15:51:53,726 INFO L78 Accepts]: Start accepts. Automaton has 5662 states and 24728 transitions. Word has length 23 [2022-01-18 15:51:53,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:53,726 INFO L470 AbstractCegarLoop]: Abstraction has 5662 states and 24728 transitions. [2022-01-18 15:51:53,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:53,726 INFO L276 IsEmpty]: Start isEmpty. Operand 5662 states and 24728 transitions. [2022-01-18 15:51:53,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:51:53,735 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:53,735 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:53,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Forceful destruction successful, exit code 0 [2022-01-18 15:51:53,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:53,935 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:51:53,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:53,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1791966650, now seen corresponding path program 139 times [2022-01-18 15:51:53,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:53,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692407903] [2022-01-18 15:51:53,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:53,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:53,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:54,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:54,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:54,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692407903] [2022-01-18 15:51:54,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692407903] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:54,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69556097] [2022-01-18 15:51:54,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:51:54,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:54,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:54,107 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:54,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-01-18 15:51:54,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:54,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:51:54,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:54,250 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:54,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:51:54,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:54,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:54,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:54,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:51:54,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:54,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:51:54,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:54,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69556097] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:54,854 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:54,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:51:54,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337908811] [2022-01-18 15:51:54,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:54,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:51:54,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:54,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:51:54,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:51:54,854 INFO L87 Difference]: Start difference. First operand 5662 states and 24728 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:55,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:55,649 INFO L93 Difference]: Finished difference Result 6056 states and 26229 transitions. [2022-01-18 15:51:55,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:51:55,649 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:51:55,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:55,664 INFO L225 Difference]: With dead ends: 6056 [2022-01-18 15:51:55,664 INFO L226 Difference]: Without dead ends: 6030 [2022-01-18 15:51:55,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=213, Invalid=1047, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:51:55,664 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 127 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:55,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 399 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1001 Invalid, 0 Unknown, 68 Unchecked, 0.4s Time] [2022-01-18 15:51:55,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6030 states. [2022-01-18 15:51:55,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6030 to 5671. [2022-01-18 15:51:55,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5671 states, 5670 states have (on average 4.3668430335097) internal successors, (24760), 5670 states have internal predecessors, (24760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:55,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5671 states to 5671 states and 24760 transitions. [2022-01-18 15:51:55,754 INFO L78 Accepts]: Start accepts. Automaton has 5671 states and 24760 transitions. Word has length 23 [2022-01-18 15:51:55,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:55,754 INFO L470 AbstractCegarLoop]: Abstraction has 5671 states and 24760 transitions. [2022-01-18 15:51:55,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:55,754 INFO L276 IsEmpty]: Start isEmpty. Operand 5671 states and 24760 transitions. [2022-01-18 15:51:55,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:51:55,764 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:55,765 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:55,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Forceful destruction successful, exit code 0 [2022-01-18 15:51:55,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2022-01-18 15:51:55,966 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:51:55,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:55,968 INFO L85 PathProgramCache]: Analyzing trace with hash 750390582, now seen corresponding path program 140 times [2022-01-18 15:51:55,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:55,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785619258] [2022-01-18 15:51:55,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:55,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:55,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:56,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:56,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:56,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785619258] [2022-01-18 15:51:56,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785619258] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:56,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539858368] [2022-01-18 15:51:56,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:51:56,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:56,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:56,162 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:56,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-01-18 15:51:56,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:51:56,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:56,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:51:56,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:56,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:56,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:51:57,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:57,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:57,519 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:57,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:51:57,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:57,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:51:57,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:57,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539858368] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:57,570 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:57,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:51:57,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145556162] [2022-01-18 15:51:57,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:57,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:51:57,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:57,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:51:57,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:51:57,571 INFO L87 Difference]: Start difference. First operand 5671 states and 24760 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:58,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:51:58,548 INFO L93 Difference]: Finished difference Result 6065 states and 26267 transitions. [2022-01-18 15:51:58,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:51:58,549 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:51:58,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:51:58,565 INFO L225 Difference]: With dead ends: 6065 [2022-01-18 15:51:58,565 INFO L226 Difference]: Without dead ends: 6037 [2022-01-18 15:51:58,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=249, Invalid=1233, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:51:58,565 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 156 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:51:58,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 478 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1217 Invalid, 0 Unknown, 113 Unchecked, 0.5s Time] [2022-01-18 15:51:58,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6037 states. [2022-01-18 15:51:58,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6037 to 5664. [2022-01-18 15:51:58,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5664 states, 5663 states have (on average 4.368002825357585) internal successors, (24736), 5663 states have internal predecessors, (24736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:58,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5664 states to 5664 states and 24736 transitions. [2022-01-18 15:51:58,659 INFO L78 Accepts]: Start accepts. Automaton has 5664 states and 24736 transitions. Word has length 23 [2022-01-18 15:51:58,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:51:58,659 INFO L470 AbstractCegarLoop]: Abstraction has 5664 states and 24736 transitions. [2022-01-18 15:51:58,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:51:58,659 INFO L276 IsEmpty]: Start isEmpty. Operand 5664 states and 24736 transitions. [2022-01-18 15:51:58,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:51:58,669 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:51:58,669 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:51:58,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Ended with exit code 0 [2022-01-18 15:51:58,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2022-01-18 15:51:58,875 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:51:58,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:51:58,876 INFO L85 PathProgramCache]: Analyzing trace with hash 463269230, now seen corresponding path program 141 times [2022-01-18 15:51:58,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:51:58,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169398269] [2022-01-18 15:51:58,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:51:58,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:51:58,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:51:59,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:59,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:51:59,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169398269] [2022-01-18 15:51:59,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169398269] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:51:59,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593226301] [2022-01-18 15:51:59,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:51:59,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:51:59,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:51:59,019 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:51:59,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-01-18 15:51:59,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:51:59,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:51:59,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:51:59,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:51:59,179 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:59,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:51:59,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:59,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:51:59,719 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:51:59,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:51:59,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:51:59,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:51:59,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:51:59,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593226301] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:51:59,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:51:59,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:51:59,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647585635] [2022-01-18 15:51:59,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:51:59,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:51:59,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:51:59,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:51:59,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:51:59,770 INFO L87 Difference]: Start difference. First operand 5664 states and 24736 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:00,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:00,604 INFO L93 Difference]: Finished difference Result 5986 states and 25952 transitions. [2022-01-18 15:52:00,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:52:00,605 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:52:00,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:00,618 INFO L225 Difference]: With dead ends: 5986 [2022-01-18 15:52:00,619 INFO L226 Difference]: Without dead ends: 5960 [2022-01-18 15:52:00,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=225, Invalid=1107, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:52:00,619 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 127 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 1112 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:00,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 428 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1112 Invalid, 0 Unknown, 81 Unchecked, 0.5s Time] [2022-01-18 15:52:00,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5960 states. [2022-01-18 15:52:00,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5960 to 5664. [2022-01-18 15:52:00,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5664 states, 5663 states have (on average 4.368002825357585) internal successors, (24736), 5663 states have internal predecessors, (24736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:00,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5664 states to 5664 states and 24736 transitions. [2022-01-18 15:52:00,708 INFO L78 Accepts]: Start accepts. Automaton has 5664 states and 24736 transitions. Word has length 23 [2022-01-18 15:52:00,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:00,708 INFO L470 AbstractCegarLoop]: Abstraction has 5664 states and 24736 transitions. [2022-01-18 15:52:00,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:00,708 INFO L276 IsEmpty]: Start isEmpty. Operand 5664 states and 24736 transitions. [2022-01-18 15:52:00,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:52:00,751 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:00,751 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:00,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Forceful destruction successful, exit code 0 [2022-01-18 15:52:00,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable256,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:00,953 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:52:00,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:00,954 INFO L85 PathProgramCache]: Analyzing trace with hash -29948156, now seen corresponding path program 142 times [2022-01-18 15:52:00,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:00,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589958961] [2022-01-18 15:52:00,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:00,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:00,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:01,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:01,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:01,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589958961] [2022-01-18 15:52:01,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589958961] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:01,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457772769] [2022-01-18 15:52:01,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:52:01,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:01,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:01,095 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:01,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-01-18 15:52:01,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:52:01,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:01,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:52:01,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:01,241 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:01,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:52:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:01,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:01,828 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:01,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:52:01,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:01,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:52:01,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:01,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457772769] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:01,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:01,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:52:01,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336659907] [2022-01-18 15:52:01,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:01,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:52:01,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:01,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:52:01,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:52:01,879 INFO L87 Difference]: Start difference. First operand 5664 states and 24736 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:02,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:02,605 INFO L93 Difference]: Finished difference Result 5976 states and 25918 transitions. [2022-01-18 15:52:02,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:52:02,605 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:52:02,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:02,618 INFO L225 Difference]: With dead ends: 5976 [2022-01-18 15:52:02,619 INFO L226 Difference]: Without dead ends: 5955 [2022-01-18 15:52:02,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:52:02,619 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 114 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:02,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 434 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1197 Invalid, 0 Unknown, 47 Unchecked, 0.5s Time] [2022-01-18 15:52:02,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5955 states. [2022-01-18 15:52:02,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5955 to 5664. [2022-01-18 15:52:02,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5664 states, 5663 states have (on average 4.368002825357585) internal successors, (24736), 5663 states have internal predecessors, (24736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:02,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5664 states to 5664 states and 24736 transitions. [2022-01-18 15:52:02,708 INFO L78 Accepts]: Start accepts. Automaton has 5664 states and 24736 transitions. Word has length 23 [2022-01-18 15:52:02,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:02,708 INFO L470 AbstractCegarLoop]: Abstraction has 5664 states and 24736 transitions. [2022-01-18 15:52:02,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:02,708 INFO L276 IsEmpty]: Start isEmpty. Operand 5664 states and 24736 transitions. [2022-01-18 15:52:02,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:52:02,717 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:02,717 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:02,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Ended with exit code 0 [2022-01-18 15:52:02,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2022-01-18 15:52:02,918 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:52:02,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:02,918 INFO L85 PathProgramCache]: Analyzing trace with hash 904828100, now seen corresponding path program 143 times [2022-01-18 15:52:02,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:02,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725843051] [2022-01-18 15:52:02,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:02,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:02,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:03,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:03,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:03,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725843051] [2022-01-18 15:52:03,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725843051] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:03,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063842421] [2022-01-18 15:52:03,067 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:52:03,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:03,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:03,068 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:03,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-01-18 15:52:03,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:52:03,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:03,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:52:03,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:03,216 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:03,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:52:03,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:03,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:03,838 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:03,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:52:03,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:03,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:52:03,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:03,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063842421] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:03,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:03,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:52:03,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843165728] [2022-01-18 15:52:03,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:03,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:52:03,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:03,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:52:03,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:52:03,892 INFO L87 Difference]: Start difference. First operand 5664 states and 24736 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:04,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:04,727 INFO L93 Difference]: Finished difference Result 6007 states and 26034 transitions. [2022-01-18 15:52:04,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:52:04,728 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:52:04,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:04,741 INFO L225 Difference]: With dead ends: 6007 [2022-01-18 15:52:04,742 INFO L226 Difference]: Without dead ends: 5982 [2022-01-18 15:52:04,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=1066, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:52:04,742 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 148 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 1147 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:04,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 432 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1147 Invalid, 0 Unknown, 65 Unchecked, 0.5s Time] [2022-01-18 15:52:04,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5982 states. [2022-01-18 15:52:04,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5982 to 5668. [2022-01-18 15:52:04,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5668 states, 5667 states have (on average 4.367743073936827) internal successors, (24752), 5667 states have internal predecessors, (24752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:04,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5668 states to 5668 states and 24752 transitions. [2022-01-18 15:52:04,872 INFO L78 Accepts]: Start accepts. Automaton has 5668 states and 24752 transitions. Word has length 23 [2022-01-18 15:52:04,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:04,872 INFO L470 AbstractCegarLoop]: Abstraction has 5668 states and 24752 transitions. [2022-01-18 15:52:04,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:04,872 INFO L276 IsEmpty]: Start isEmpty. Operand 5668 states and 24752 transitions. [2022-01-18 15:52:04,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:52:04,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:04,882 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:04,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Ended with exit code 0 [2022-01-18 15:52:05,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2022-01-18 15:52:05,082 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:52:05,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:05,083 INFO L85 PathProgramCache]: Analyzing trace with hash -107864432, now seen corresponding path program 144 times [2022-01-18 15:52:05,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:05,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672884410] [2022-01-18 15:52:05,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:05,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:05,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:05,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:05,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672884410] [2022-01-18 15:52:05,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672884410] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:05,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112425338] [2022-01-18 15:52:05,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:52:05,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:05,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:05,231 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:05,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-01-18 15:52:05,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:52:05,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:05,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:52:05,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:05,377 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:05,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:52:05,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:05,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:06,009 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:06,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:52:06,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:06,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:52:06,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:06,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112425338] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:06,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:06,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:52:06,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308911383] [2022-01-18 15:52:06,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:06,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:52:06,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:06,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:52:06,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:52:06,060 INFO L87 Difference]: Start difference. First operand 5668 states and 24752 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:06,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:06,949 INFO L93 Difference]: Finished difference Result 6020 states and 26088 transitions. [2022-01-18 15:52:06,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:52:06,949 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:52:06,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:06,964 INFO L225 Difference]: With dead ends: 6020 [2022-01-18 15:52:06,964 INFO L226 Difference]: Without dead ends: 5999 [2022-01-18 15:52:06,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=225, Invalid=1181, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:52:06,964 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 151 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 1376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:06,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 451 Invalid, 1376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1200 Invalid, 0 Unknown, 93 Unchecked, 0.5s Time] [2022-01-18 15:52:06,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5999 states. [2022-01-18 15:52:07,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5999 to 5662. [2022-01-18 15:52:07,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5662 states, 5661 states have (on average 4.368132838721074) internal successors, (24728), 5661 states have internal predecessors, (24728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:07,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5662 states to 5662 states and 24728 transitions. [2022-01-18 15:52:07,053 INFO L78 Accepts]: Start accepts. Automaton has 5662 states and 24728 transitions. Word has length 23 [2022-01-18 15:52:07,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:07,053 INFO L470 AbstractCegarLoop]: Abstraction has 5662 states and 24728 transitions. [2022-01-18 15:52:07,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:07,053 INFO L276 IsEmpty]: Start isEmpty. Operand 5662 states and 24728 transitions. [2022-01-18 15:52:07,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:52:07,062 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:07,062 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:07,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Ended with exit code 0 [2022-01-18 15:52:07,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2022-01-18 15:52:07,263 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:52:07,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:07,263 INFO L85 PathProgramCache]: Analyzing trace with hash -413362830, now seen corresponding path program 145 times [2022-01-18 15:52:07,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:07,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104741931] [2022-01-18 15:52:07,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:07,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:07,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:07,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:07,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:07,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104741931] [2022-01-18 15:52:07,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104741931] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:07,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464834950] [2022-01-18 15:52:07,401 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:52:07,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:07,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:07,402 INFO L229 MonitoredProcess]: Starting monitored process 261 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:07,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-01-18 15:52:07,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:07,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:52:07,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:07,561 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:07,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:52:07,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:07,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:08,076 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:08,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:52:08,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:08,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:52:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:08,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464834950] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:08,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:08,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:52:08,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970974673] [2022-01-18 15:52:08,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:08,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:52:08,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:08,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:52:08,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:52:08,128 INFO L87 Difference]: Start difference. First operand 5662 states and 24728 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:09,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:09,304 INFO L93 Difference]: Finished difference Result 6299 states and 27180 transitions. [2022-01-18 15:52:09,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 15:52:09,305 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:52:09,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:09,320 INFO L225 Difference]: With dead ends: 6299 [2022-01-18 15:52:09,320 INFO L226 Difference]: Without dead ends: 6274 [2022-01-18 15:52:09,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=309, Invalid=1497, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 15:52:09,321 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 203 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:09,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 550 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1333 Invalid, 0 Unknown, 170 Unchecked, 0.6s Time] [2022-01-18 15:52:09,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6274 states. [2022-01-18 15:52:09,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6274 to 5672. [2022-01-18 15:52:09,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5672 states, 5671 states have (on average 4.367660024687004) internal successors, (24769), 5671 states have internal predecessors, (24769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:09,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5672 states to 5672 states and 24769 transitions. [2022-01-18 15:52:09,432 INFO L78 Accepts]: Start accepts. Automaton has 5672 states and 24769 transitions. Word has length 23 [2022-01-18 15:52:09,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:09,432 INFO L470 AbstractCegarLoop]: Abstraction has 5672 states and 24769 transitions. [2022-01-18 15:52:09,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:09,432 INFO L276 IsEmpty]: Start isEmpty. Operand 5672 states and 24769 transitions. [2022-01-18 15:52:09,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:52:09,442 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:09,442 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:09,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Ended with exit code 0 [2022-01-18 15:52:09,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2022-01-18 15:52:09,643 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:52:09,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:09,643 INFO L85 PathProgramCache]: Analyzing trace with hash 662348326, now seen corresponding path program 146 times [2022-01-18 15:52:09,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:09,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27165651] [2022-01-18 15:52:09,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:09,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:09,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:09,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27165651] [2022-01-18 15:52:09,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27165651] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:09,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408697572] [2022-01-18 15:52:09,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:52:09,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:09,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:09,784 INFO L229 MonitoredProcess]: Starting monitored process 262 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:09,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-01-18 15:52:09,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:52:09,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:09,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:52:09,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:09,945 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:09,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:52:10,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:10,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:10,479 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:10,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:52:10,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:10,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:52:10,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:10,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408697572] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:10,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:10,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:52:10,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751441579] [2022-01-18 15:52:10,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:10,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:52:10,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:10,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:52:10,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:52:10,534 INFO L87 Difference]: Start difference. First operand 5672 states and 24769 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:11,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:11,480 INFO L93 Difference]: Finished difference Result 6251 states and 27006 transitions. [2022-01-18 15:52:11,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:52:11,481 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:52:11,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:11,495 INFO L225 Difference]: With dead ends: 6251 [2022-01-18 15:52:11,495 INFO L226 Difference]: Without dead ends: 6230 [2022-01-18 15:52:11,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=246, Invalid=1236, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:52:11,496 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 209 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:11,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 442 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1141 Invalid, 0 Unknown, 83 Unchecked, 0.5s Time] [2022-01-18 15:52:11,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6230 states. [2022-01-18 15:52:11,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6230 to 5664. [2022-01-18 15:52:11,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5664 states, 5663 states have (on average 4.367826240508564) internal successors, (24735), 5663 states have internal predecessors, (24735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:11,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5664 states to 5664 states and 24735 transitions. [2022-01-18 15:52:11,585 INFO L78 Accepts]: Start accepts. Automaton has 5664 states and 24735 transitions. Word has length 23 [2022-01-18 15:52:11,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:11,586 INFO L470 AbstractCegarLoop]: Abstraction has 5664 states and 24735 transitions. [2022-01-18 15:52:11,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:11,586 INFO L276 IsEmpty]: Start isEmpty. Operand 5664 states and 24735 transitions. [2022-01-18 15:52:11,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:52:11,595 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:11,595 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:11,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Ended with exit code 0 [2022-01-18 15:52:11,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:11,795 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:52:11,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:11,796 INFO L85 PathProgramCache]: Analyzing trace with hash -517382184, now seen corresponding path program 147 times [2022-01-18 15:52:11,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:11,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805112083] [2022-01-18 15:52:11,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:11,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:11,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:11,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:11,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805112083] [2022-01-18 15:52:11,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805112083] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:11,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605837062] [2022-01-18 15:52:11,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:52:11,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:11,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:11,923 INFO L229 MonitoredProcess]: Starting monitored process 263 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:11,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-01-18 15:52:11,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:52:11,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:11,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 15:52:11,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:12,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:12,133 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 15:52:12,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-01-18 15:52:12,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:12,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:12,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:52:12,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605837062] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:12,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:12,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-01-18 15:52:12,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516669564] [2022-01-18 15:52:12,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:12,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:52:12,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:12,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:52:12,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:52:12,424 INFO L87 Difference]: Start difference. First operand 5664 states and 24735 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:14,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:14,532 INFO L93 Difference]: Finished difference Result 7819 states and 33303 transitions. [2022-01-18 15:52:14,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 15:52:14,532 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:52:14,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:14,550 INFO L225 Difference]: With dead ends: 7819 [2022-01-18 15:52:14,550 INFO L226 Difference]: Without dead ends: 7726 [2022-01-18 15:52:14,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=492, Invalid=3414, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 15:52:14,551 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 391 mSDsluCounter, 1581 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 2709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:14,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 998 Invalid, 2709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 2554 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 15:52:14,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7726 states. [2022-01-18 15:52:14,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7726 to 5786. [2022-01-18 15:52:14,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5786 states, 5785 states have (on average 4.379256698357822) internal successors, (25334), 5785 states have internal predecessors, (25334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:14,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5786 states to 5786 states and 25334 transitions. [2022-01-18 15:52:14,656 INFO L78 Accepts]: Start accepts. Automaton has 5786 states and 25334 transitions. Word has length 23 [2022-01-18 15:52:14,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:14,656 INFO L470 AbstractCegarLoop]: Abstraction has 5786 states and 25334 transitions. [2022-01-18 15:52:14,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:14,657 INFO L276 IsEmpty]: Start isEmpty. Operand 5786 states and 25334 transitions. [2022-01-18 15:52:14,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:52:14,666 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:14,666 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:14,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Forceful destruction successful, exit code 0 [2022-01-18 15:52:14,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:14,867 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:52:14,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:14,867 INFO L85 PathProgramCache]: Analyzing trace with hash 70363138, now seen corresponding path program 148 times [2022-01-18 15:52:14,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:14,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314256224] [2022-01-18 15:52:14,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:14,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:14,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:15,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:15,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:15,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314256224] [2022-01-18 15:52:15,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314256224] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:15,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244534241] [2022-01-18 15:52:15,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:52:15,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:15,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:15,003 INFO L229 MonitoredProcess]: Starting monitored process 264 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:15,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-01-18 15:52:15,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:52:15,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:15,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:52:15,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:15,160 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:15,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:52:15,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:15,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:15,663 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:15,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:52:15,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:15,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:52:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:15,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244534241] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:15,717 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:15,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:52:15,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861465472] [2022-01-18 15:52:15,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:15,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:52:15,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:15,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:52:15,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:52:15,718 INFO L87 Difference]: Start difference. First operand 5786 states and 25334 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:16,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:16,734 INFO L93 Difference]: Finished difference Result 6361 states and 27543 transitions. [2022-01-18 15:52:16,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 15:52:16,735 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:52:16,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:16,750 INFO L225 Difference]: With dead ends: 6361 [2022-01-18 15:52:16,750 INFO L226 Difference]: Without dead ends: 6336 [2022-01-18 15:52:16,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=286, Invalid=1436, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:52:16,750 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 264 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:16,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 465 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1075 Invalid, 0 Unknown, 79 Unchecked, 0.5s Time] [2022-01-18 15:52:16,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6336 states. [2022-01-18 15:52:16,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6336 to 5794. [2022-01-18 15:52:16,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5794 states, 5793 states have (on average 4.3790781978249615) internal successors, (25368), 5793 states have internal predecessors, (25368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:16,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5794 states to 5794 states and 25368 transitions. [2022-01-18 15:52:16,843 INFO L78 Accepts]: Start accepts. Automaton has 5794 states and 25368 transitions. Word has length 23 [2022-01-18 15:52:16,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:16,843 INFO L470 AbstractCegarLoop]: Abstraction has 5794 states and 25368 transitions. [2022-01-18 15:52:16,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:16,843 INFO L276 IsEmpty]: Start isEmpty. Operand 5794 states and 25368 transitions. [2022-01-18 15:52:16,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:52:16,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:16,853 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:16,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Ended with exit code 0 [2022-01-18 15:52:17,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:17,054 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:52:17,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:17,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1146074294, now seen corresponding path program 149 times [2022-01-18 15:52:17,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:17,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233652549] [2022-01-18 15:52:17,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:17,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:17,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:17,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:17,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:17,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233652549] [2022-01-18 15:52:17,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233652549] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:17,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29656570] [2022-01-18 15:52:17,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:52:17,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:17,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:17,193 INFO L229 MonitoredProcess]: Starting monitored process 265 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:17,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-01-18 15:52:17,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:52:17,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:17,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:52:17,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:17,356 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:17,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:52:17,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:17,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:17,903 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:17,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:52:17,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:17,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:52:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:17,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29656570] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:17,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:17,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:52:17,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193511830] [2022-01-18 15:52:17,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:17,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:52:17,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:17,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:52:17,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:52:17,956 INFO L87 Difference]: Start difference. First operand 5794 states and 25368 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:18,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:18,960 INFO L93 Difference]: Finished difference Result 6353 states and 27510 transitions. [2022-01-18 15:52:18,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:52:18,961 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:52:18,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:18,976 INFO L225 Difference]: With dead ends: 6353 [2022-01-18 15:52:18,976 INFO L226 Difference]: Without dead ends: 6332 [2022-01-18 15:52:18,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=253, Invalid=1229, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:52:18,976 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 177 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 1287 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:18,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 499 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1287 Invalid, 0 Unknown, 124 Unchecked, 0.5s Time] [2022-01-18 15:52:18,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6332 states. [2022-01-18 15:52:19,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6332 to 5790. [2022-01-18 15:52:19,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5790 states, 5789 states have (on average 4.37934012782864) internal successors, (25352), 5789 states have internal predecessors, (25352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:19,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5790 states to 5790 states and 25352 transitions. [2022-01-18 15:52:19,069 INFO L78 Accepts]: Start accepts. Automaton has 5790 states and 25352 transitions. Word has length 23 [2022-01-18 15:52:19,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:19,069 INFO L470 AbstractCegarLoop]: Abstraction has 5790 states and 25352 transitions. [2022-01-18 15:52:19,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:19,069 INFO L276 IsEmpty]: Start isEmpty. Operand 5790 states and 25352 transitions. [2022-01-18 15:52:19,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:52:19,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:19,078 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:19,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Forceful destruction successful, exit code 0 [2022-01-18 15:52:19,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:19,279 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:52:19,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:19,279 INFO L85 PathProgramCache]: Analyzing trace with hash 882361692, now seen corresponding path program 150 times [2022-01-18 15:52:19,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:19,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960451925] [2022-01-18 15:52:19,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:19,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:19,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:19,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:19,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960451925] [2022-01-18 15:52:19,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960451925] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:19,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930459343] [2022-01-18 15:52:19,410 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:52:19,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:19,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:19,411 INFO L229 MonitoredProcess]: Starting monitored process 266 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:19,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-01-18 15:52:19,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:52:19,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:19,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:52:19,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:19,573 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:19,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:52:19,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:19,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:20,084 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:20,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:52:20,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:20,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:52:20,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:20,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930459343] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:20,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:20,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:52:20,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296421909] [2022-01-18 15:52:20,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:20,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:52:20,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:20,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:52:20,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:52:20,137 INFO L87 Difference]: Start difference. First operand 5790 states and 25352 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:20,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:20,904 INFO L93 Difference]: Finished difference Result 6149 states and 26712 transitions. [2022-01-18 15:52:20,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:52:20,904 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:52:20,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:20,919 INFO L225 Difference]: With dead ends: 6149 [2022-01-18 15:52:20,919 INFO L226 Difference]: Without dead ends: 6123 [2022-01-18 15:52:20,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=188, Invalid=1072, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:52:20,919 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 145 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:20,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 410 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1040 Invalid, 0 Unknown, 146 Unchecked, 0.4s Time] [2022-01-18 15:52:20,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6123 states. [2022-01-18 15:52:20,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6123 to 5800. [2022-01-18 15:52:20,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5800 states, 5799 states have (on average 4.377306432143473) internal successors, (25384), 5799 states have internal predecessors, (25384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:21,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5800 states to 5800 states and 25384 transitions. [2022-01-18 15:52:21,011 INFO L78 Accepts]: Start accepts. Automaton has 5800 states and 25384 transitions. Word has length 23 [2022-01-18 15:52:21,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:21,011 INFO L470 AbstractCegarLoop]: Abstraction has 5800 states and 25384 transitions. [2022-01-18 15:52:21,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:21,012 INFO L276 IsEmpty]: Start isEmpty. Operand 5800 states and 25384 transitions. [2022-01-18 15:52:21,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:52:21,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:21,021 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:21,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Ended with exit code 0 [2022-01-18 15:52:21,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2022-01-18 15:52:21,222 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:52:21,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:21,222 INFO L85 PathProgramCache]: Analyzing trace with hash -159214376, now seen corresponding path program 151 times [2022-01-18 15:52:21,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:21,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240625633] [2022-01-18 15:52:21,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:21,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:21,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:21,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:21,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240625633] [2022-01-18 15:52:21,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240625633] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:21,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412204451] [2022-01-18 15:52:21,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:52:21,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:21,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:21,358 INFO L229 MonitoredProcess]: Starting monitored process 267 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:21,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-01-18 15:52:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:21,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:52:21,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:21,525 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:21,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:52:22,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:22,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:22,363 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:22,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:52:22,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:22,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:52:22,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:22,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412204451] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:22,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:22,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:52:22,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239426758] [2022-01-18 15:52:22,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:22,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:52:22,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:22,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:52:22,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=560, Unknown=1, NotChecked=0, Total=650 [2022-01-18 15:52:22,433 INFO L87 Difference]: Start difference. First operand 5800 states and 25384 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:23,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:23,289 INFO L93 Difference]: Finished difference Result 6203 states and 26927 transitions. [2022-01-18 15:52:23,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:52:23,289 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:52:23,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:23,307 INFO L225 Difference]: With dead ends: 6203 [2022-01-18 15:52:23,307 INFO L226 Difference]: Without dead ends: 6175 [2022-01-18 15:52:23,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=193, Invalid=1066, Unknown=1, NotChecked=0, Total=1260 [2022-01-18 15:52:23,308 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 125 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:23,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 453 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1150 Invalid, 0 Unknown, 176 Unchecked, 0.5s Time] [2022-01-18 15:52:23,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6175 states. [2022-01-18 15:52:23,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6175 to 5793. [2022-01-18 15:52:23,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5793 states, 5792 states have (on average 4.377935082872928) internal successors, (25357), 5792 states have internal predecessors, (25357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:23,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5793 states to 5793 states and 25357 transitions. [2022-01-18 15:52:23,428 INFO L78 Accepts]: Start accepts. Automaton has 5793 states and 25357 transitions. Word has length 23 [2022-01-18 15:52:23,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:23,428 INFO L470 AbstractCegarLoop]: Abstraction has 5793 states and 25357 transitions. [2022-01-18 15:52:23,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:23,428 INFO L276 IsEmpty]: Start isEmpty. Operand 5793 states and 25357 transitions. [2022-01-18 15:52:23,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:52:23,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:23,441 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:23,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Forceful destruction successful, exit code 0 [2022-01-18 15:52:23,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:23,661 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:52:23,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:23,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1045012656, now seen corresponding path program 152 times [2022-01-18 15:52:23,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:23,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297523363] [2022-01-18 15:52:23,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:23,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:23,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:23,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:23,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:23,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297523363] [2022-01-18 15:52:23,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297523363] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:23,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138409645] [2022-01-18 15:52:23,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:52:23,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:23,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:23,816 INFO L229 MonitoredProcess]: Starting monitored process 268 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:23,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-01-18 15:52:23,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:52:23,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:23,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:52:23,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:24,003 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:24,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:52:24,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:24,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:24,516 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:24,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:52:24,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:24,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:52:24,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:24,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138409645] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:24,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:24,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:52:24,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449168701] [2022-01-18 15:52:24,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:24,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:52:24,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:24,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:52:24,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:52:24,568 INFO L87 Difference]: Start difference. First operand 5793 states and 25357 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:25,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:25,164 INFO L93 Difference]: Finished difference Result 6153 states and 26728 transitions. [2022-01-18 15:52:25,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:52:25,165 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:52:25,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:25,179 INFO L225 Difference]: With dead ends: 6153 [2022-01-18 15:52:25,179 INFO L226 Difference]: Without dead ends: 6119 [2022-01-18 15:52:25,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:52:25,180 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 136 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:25,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 343 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 874 Invalid, 0 Unknown, 81 Unchecked, 0.4s Time] [2022-01-18 15:52:25,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6119 states. [2022-01-18 15:52:25,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6119 to 5790. [2022-01-18 15:52:25,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5790 states, 5789 states have (on average 4.378821903610295) internal successors, (25349), 5789 states have internal predecessors, (25349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:25,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5790 states to 5790 states and 25349 transitions. [2022-01-18 15:52:25,275 INFO L78 Accepts]: Start accepts. Automaton has 5790 states and 25349 transitions. Word has length 23 [2022-01-18 15:52:25,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:25,275 INFO L470 AbstractCegarLoop]: Abstraction has 5790 states and 25349 transitions. [2022-01-18 15:52:25,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:25,275 INFO L276 IsEmpty]: Start isEmpty. Operand 5790 states and 25349 transitions. [2022-01-18 15:52:25,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:52:25,285 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:25,285 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:25,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Forceful destruction successful, exit code 0 [2022-01-18 15:52:25,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2022-01-18 15:52:25,485 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:52:25,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:25,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1230066938, now seen corresponding path program 153 times [2022-01-18 15:52:25,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:25,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953332338] [2022-01-18 15:52:25,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:25,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:25,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:25,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:25,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953332338] [2022-01-18 15:52:25,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953332338] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:25,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184515739] [2022-01-18 15:52:25,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:52:25,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:25,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:25,652 INFO L229 MonitoredProcess]: Starting monitored process 269 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:25,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-01-18 15:52:25,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:52:25,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:25,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:52:25,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:25,803 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:25,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:52:26,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:26,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:26,376 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:26,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:52:26,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:26,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:52:26,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:26,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184515739] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:26,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:26,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:52:26,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246869178] [2022-01-18 15:52:26,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:26,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:52:26,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:26,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:52:26,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:52:26,431 INFO L87 Difference]: Start difference. First operand 5790 states and 25349 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:27,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:27,154 INFO L93 Difference]: Finished difference Result 6107 states and 26537 transitions. [2022-01-18 15:52:27,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:52:27,154 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:52:27,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:27,169 INFO L225 Difference]: With dead ends: 6107 [2022-01-18 15:52:27,169 INFO L226 Difference]: Without dead ends: 6081 [2022-01-18 15:52:27,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:52:27,169 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 120 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:27,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 396 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 857 Invalid, 0 Unknown, 108 Unchecked, 0.4s Time] [2022-01-18 15:52:27,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6081 states. [2022-01-18 15:52:27,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6081 to 5799. [2022-01-18 15:52:27,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5799 states, 5798 states have (on average 4.3775439806829946) internal successors, (25381), 5798 states have internal predecessors, (25381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:27,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5799 states to 5799 states and 25381 transitions. [2022-01-18 15:52:27,296 INFO L78 Accepts]: Start accepts. Automaton has 5799 states and 25381 transitions. Word has length 23 [2022-01-18 15:52:27,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:27,296 INFO L470 AbstractCegarLoop]: Abstraction has 5799 states and 25381 transitions. [2022-01-18 15:52:27,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:27,297 INFO L276 IsEmpty]: Start isEmpty. Operand 5799 states and 25381 transitions. [2022-01-18 15:52:27,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:52:27,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:27,306 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:27,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Ended with exit code 0 [2022-01-18 15:52:27,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2022-01-18 15:52:27,506 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:52:27,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:27,507 INFO L85 PathProgramCache]: Analyzing trace with hash 2023324290, now seen corresponding path program 154 times [2022-01-18 15:52:27,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:27,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611626419] [2022-01-18 15:52:27,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:27,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:27,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:27,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:27,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:27,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611626419] [2022-01-18 15:52:27,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611626419] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:27,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438212795] [2022-01-18 15:52:27,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:52:27,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:27,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:27,651 INFO L229 MonitoredProcess]: Starting monitored process 270 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:27,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-01-18 15:52:27,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:52:27,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:27,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:52:27,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:27,798 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:27,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:52:29,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:29,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:30,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:30,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:52:30,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:30,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:52:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:30,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438212795] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:30,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:30,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:52:30,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991518934] [2022-01-18 15:52:30,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:30,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:52:30,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:30,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:52:30,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:52:30,202 INFO L87 Difference]: Start difference. First operand 5799 states and 25381 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:31,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:31,097 INFO L93 Difference]: Finished difference Result 6202 states and 26925 transitions. [2022-01-18 15:52:31,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:52:31,097 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:52:31,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:31,112 INFO L225 Difference]: With dead ends: 6202 [2022-01-18 15:52:31,112 INFO L226 Difference]: Without dead ends: 6174 [2022-01-18 15:52:31,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=249, Invalid=1233, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:52:31,112 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 195 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:31,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 384 Invalid, 1238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 955 Invalid, 0 Unknown, 181 Unchecked, 0.4s Time] [2022-01-18 15:52:31,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6174 states. [2022-01-18 15:52:31,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6174 to 5792. [2022-01-18 15:52:31,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5792 states, 5791 states have (on average 4.378691072353652) internal successors, (25357), 5791 states have internal predecessors, (25357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:31,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5792 states to 5792 states and 25357 transitions. [2022-01-18 15:52:31,203 INFO L78 Accepts]: Start accepts. Automaton has 5792 states and 25357 transitions. Word has length 23 [2022-01-18 15:52:31,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:31,203 INFO L470 AbstractCegarLoop]: Abstraction has 5792 states and 25357 transitions. [2022-01-18 15:52:31,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:31,203 INFO L276 IsEmpty]: Start isEmpty. Operand 5792 states and 25357 transitions. [2022-01-18 15:52:31,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:52:31,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:31,213 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:31,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Ended with exit code 0 [2022-01-18 15:52:31,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2022-01-18 15:52:31,414 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:52:31,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:31,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1736202938, now seen corresponding path program 155 times [2022-01-18 15:52:31,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:31,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306356663] [2022-01-18 15:52:31,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:31,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:31,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:31,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:31,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:31,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306356663] [2022-01-18 15:52:31,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306356663] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:31,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784721174] [2022-01-18 15:52:31,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:52:31,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:31,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:31,607 INFO L229 MonitoredProcess]: Starting monitored process 271 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:31,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-01-18 15:52:31,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:52:31,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:31,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:52:31,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:31,751 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:31,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:52:32,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:32,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:32,300 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:32,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:52:32,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:32,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:52:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:32,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784721174] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:32,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:32,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:52:32,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812239497] [2022-01-18 15:52:32,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:32,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:52:32,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:32,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:52:32,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:52:32,352 INFO L87 Difference]: Start difference. First operand 5792 states and 25357 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:33,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:33,188 INFO L93 Difference]: Finished difference Result 6123 states and 26610 transitions. [2022-01-18 15:52:33,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:52:33,188 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:52:33,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:33,203 INFO L225 Difference]: With dead ends: 6123 [2022-01-18 15:52:33,203 INFO L226 Difference]: Without dead ends: 6097 [2022-01-18 15:52:33,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=225, Invalid=1107, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:52:33,203 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 120 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:33,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 491 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1121 Invalid, 0 Unknown, 51 Unchecked, 0.5s Time] [2022-01-18 15:52:33,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6097 states. [2022-01-18 15:52:33,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6097 to 5792. [2022-01-18 15:52:33,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5792 states, 5791 states have (on average 4.378691072353652) internal successors, (25357), 5791 states have internal predecessors, (25357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:33,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5792 states to 5792 states and 25357 transitions. [2022-01-18 15:52:33,350 INFO L78 Accepts]: Start accepts. Automaton has 5792 states and 25357 transitions. Word has length 23 [2022-01-18 15:52:33,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:33,350 INFO L470 AbstractCegarLoop]: Abstraction has 5792 states and 25357 transitions. [2022-01-18 15:52:33,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:33,350 INFO L276 IsEmpty]: Start isEmpty. Operand 5792 states and 25357 transitions. [2022-01-18 15:52:33,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:52:33,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:33,359 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:33,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Ended with exit code 0 [2022-01-18 15:52:33,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:33,560 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:52:33,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:33,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1242985552, now seen corresponding path program 156 times [2022-01-18 15:52:33,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:33,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165789826] [2022-01-18 15:52:33,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:33,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:33,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:33,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:33,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:33,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165789826] [2022-01-18 15:52:33,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165789826] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:33,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239791730] [2022-01-18 15:52:33,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:52:33,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:33,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:33,702 INFO L229 MonitoredProcess]: Starting monitored process 272 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:33,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-01-18 15:52:33,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:52:33,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:33,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:52:33,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:33,849 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:33,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:52:34,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:34,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:34,435 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:34,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:52:34,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:34,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:52:34,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:34,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239791730] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:34,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:34,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:52:34,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951649951] [2022-01-18 15:52:34,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:34,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:52:34,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:34,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:52:34,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:52:34,485 INFO L87 Difference]: Start difference. First operand 5792 states and 25357 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:35,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:35,010 INFO L93 Difference]: Finished difference Result 6020 states and 26208 transitions. [2022-01-18 15:52:35,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:52:35,010 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:52:35,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:35,024 INFO L225 Difference]: With dead ends: 6020 [2022-01-18 15:52:35,024 INFO L226 Difference]: Without dead ends: 5999 [2022-01-18 15:52:35,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:52:35,024 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 92 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:35,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 402 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 840 Invalid, 0 Unknown, 79 Unchecked, 0.3s Time] [2022-01-18 15:52:35,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5999 states. [2022-01-18 15:52:35,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5999 to 5792. [2022-01-18 15:52:35,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5792 states, 5791 states have (on average 4.378691072353652) internal successors, (25357), 5791 states have internal predecessors, (25357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:35,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5792 states to 5792 states and 25357 transitions. [2022-01-18 15:52:35,115 INFO L78 Accepts]: Start accepts. Automaton has 5792 states and 25357 transitions. Word has length 23 [2022-01-18 15:52:35,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:35,115 INFO L470 AbstractCegarLoop]: Abstraction has 5792 states and 25357 transitions. [2022-01-18 15:52:35,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:35,115 INFO L276 IsEmpty]: Start isEmpty. Operand 5792 states and 25357 transitions. [2022-01-18 15:52:35,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:52:35,125 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:35,125 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:35,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Ended with exit code 0 [2022-01-18 15:52:35,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:35,325 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:52:35,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:35,326 INFO L85 PathProgramCache]: Analyzing trace with hash -2117205488, now seen corresponding path program 157 times [2022-01-18 15:52:35,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:35,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617460750] [2022-01-18 15:52:35,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:35,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:35,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:35,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:35,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:35,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617460750] [2022-01-18 15:52:35,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617460750] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:35,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903208538] [2022-01-18 15:52:35,476 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:52:35,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:35,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:35,477 INFO L229 MonitoredProcess]: Starting monitored process 273 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:35,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-01-18 15:52:35,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:35,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:52:35,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:35,626 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:35,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:52:36,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:36,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:36,246 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:36,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:52:36,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:36,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:52:36,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:36,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903208538] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:36,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:36,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:52:36,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753900943] [2022-01-18 15:52:36,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:36,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:52:36,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:36,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:52:36,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:52:36,301 INFO L87 Difference]: Start difference. First operand 5792 states and 25357 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:37,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:37,275 INFO L93 Difference]: Finished difference Result 6191 states and 26873 transitions. [2022-01-18 15:52:37,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 15:52:37,276 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:52:37,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:37,290 INFO L225 Difference]: With dead ends: 6191 [2022-01-18 15:52:37,290 INFO L226 Difference]: Without dead ends: 6166 [2022-01-18 15:52:37,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=248, Invalid=1474, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:52:37,291 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 210 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 1335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:37,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 430 Invalid, 1335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1060 Invalid, 0 Unknown, 186 Unchecked, 0.5s Time] [2022-01-18 15:52:37,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6166 states. [2022-01-18 15:52:37,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6166 to 5796. [2022-01-18 15:52:37,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5796 states, 5795 states have (on average 4.378429680759275) internal successors, (25373), 5795 states have internal predecessors, (25373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:37,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5796 states to 5796 states and 25373 transitions. [2022-01-18 15:52:37,383 INFO L78 Accepts]: Start accepts. Automaton has 5796 states and 25373 transitions. Word has length 23 [2022-01-18 15:52:37,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:37,383 INFO L470 AbstractCegarLoop]: Abstraction has 5796 states and 25373 transitions. [2022-01-18 15:52:37,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:37,384 INFO L276 IsEmpty]: Start isEmpty. Operand 5796 states and 25373 transitions. [2022-01-18 15:52:37,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:52:37,423 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:37,423 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:37,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Ended with exit code 0 [2022-01-18 15:52:37,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:37,623 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:52:37,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:37,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1165069276, now seen corresponding path program 158 times [2022-01-18 15:52:37,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:37,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367915350] [2022-01-18 15:52:37,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:37,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:37,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:37,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:37,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367915350] [2022-01-18 15:52:37,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367915350] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:37,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781084028] [2022-01-18 15:52:37,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:52:37,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:37,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:37,771 INFO L229 MonitoredProcess]: Starting monitored process 274 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:37,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-01-18 15:52:37,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:52:37,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:37,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:52:37,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:37,915 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:37,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:52:38,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:38,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:38,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:38,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:52:38,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:38,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:52:38,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:38,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781084028] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:38,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:38,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:52:38,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111738563] [2022-01-18 15:52:38,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:38,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:52:38,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:38,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:52:38,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:52:38,587 INFO L87 Difference]: Start difference. First operand 5796 states and 25373 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:39,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:39,433 INFO L93 Difference]: Finished difference Result 6158 states and 26750 transitions. [2022-01-18 15:52:39,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:52:39,434 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:52:39,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:39,448 INFO L225 Difference]: With dead ends: 6158 [2022-01-18 15:52:39,448 INFO L226 Difference]: Without dead ends: 6137 [2022-01-18 15:52:39,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=225, Invalid=1181, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:52:39,448 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 150 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:39,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 417 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1082 Invalid, 0 Unknown, 112 Unchecked, 0.5s Time] [2022-01-18 15:52:39,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6137 states. [2022-01-18 15:52:39,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6137 to 5790. [2022-01-18 15:52:39,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5790 states, 5789 states have (on average 4.378821903610295) internal successors, (25349), 5789 states have internal predecessors, (25349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:39,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5790 states to 5790 states and 25349 transitions. [2022-01-18 15:52:39,539 INFO L78 Accepts]: Start accepts. Automaton has 5790 states and 25349 transitions. Word has length 23 [2022-01-18 15:52:39,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:39,539 INFO L470 AbstractCegarLoop]: Abstraction has 5790 states and 25349 transitions. [2022-01-18 15:52:39,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:39,539 INFO L276 IsEmpty]: Start isEmpty. Operand 5790 states and 25349 transitions. [2022-01-18 15:52:39,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:52:39,548 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:39,548 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:39,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Forceful destruction successful, exit code 0 [2022-01-18 15:52:39,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:39,749 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:52:39,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:39,749 INFO L85 PathProgramCache]: Analyzing trace with hash -552416894, now seen corresponding path program 159 times [2022-01-18 15:52:39,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:39,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046655196] [2022-01-18 15:52:39,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:39,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:39,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:39,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:39,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:39,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046655196] [2022-01-18 15:52:39,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046655196] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:39,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913728431] [2022-01-18 15:52:39,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:52:39,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:39,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:39,878 INFO L229 MonitoredProcess]: Starting monitored process 275 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:39,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-01-18 15:52:39,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:52:39,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:39,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:52:39,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:40,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:40,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:52:40,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:40,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:40,584 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:40,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:52:40,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:40,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:52:40,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:40,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913728431] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:40,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:40,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:52:40,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946804689] [2022-01-18 15:52:40,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:40,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:52:40,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:40,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:52:40,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:52:40,637 INFO L87 Difference]: Start difference. First operand 5790 states and 25349 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:41,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:41,433 INFO L93 Difference]: Finished difference Result 6300 states and 27305 transitions. [2022-01-18 15:52:41,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:52:41,434 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:52:41,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:41,448 INFO L225 Difference]: With dead ends: 6300 [2022-01-18 15:52:41,449 INFO L226 Difference]: Without dead ends: 6269 [2022-01-18 15:52:41,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=1206, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:52:41,449 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 175 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:41,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 491 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1162 Invalid, 0 Unknown, 155 Unchecked, 0.5s Time] [2022-01-18 15:52:41,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6269 states. [2022-01-18 15:52:41,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6269 to 5792. [2022-01-18 15:52:41,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5792 states, 5791 states have (on average 4.378345708858574) internal successors, (25355), 5791 states have internal predecessors, (25355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:41,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5792 states to 5792 states and 25355 transitions. [2022-01-18 15:52:41,542 INFO L78 Accepts]: Start accepts. Automaton has 5792 states and 25355 transitions. Word has length 23 [2022-01-18 15:52:41,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:41,542 INFO L470 AbstractCegarLoop]: Abstraction has 5792 states and 25355 transitions. [2022-01-18 15:52:41,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:41,542 INFO L276 IsEmpty]: Start isEmpty. Operand 5792 states and 25355 transitions. [2022-01-18 15:52:41,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:52:41,552 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:41,552 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:41,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Ended with exit code 0 [2022-01-18 15:52:41,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:41,752 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:52:41,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:41,752 INFO L85 PathProgramCache]: Analyzing trace with hash 487818904, now seen corresponding path program 160 times [2022-01-18 15:52:41,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:41,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900821459] [2022-01-18 15:52:41,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:41,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:41,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:41,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:41,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900821459] [2022-01-18 15:52:41,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900821459] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:41,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481842089] [2022-01-18 15:52:41,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:52:41,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:41,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:41,894 INFO L229 MonitoredProcess]: Starting monitored process 276 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:41,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-01-18 15:52:41,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:52:41,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:41,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:52:41,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:42,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:42,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:52:42,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:42,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:42,653 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:42,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:52:42,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:42,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:52:42,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:42,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481842089] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:42,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:42,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:52:42,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293438836] [2022-01-18 15:52:42,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:42,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:52:42,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:42,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:52:42,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:52:42,707 INFO L87 Difference]: Start difference. First operand 5792 states and 25355 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:43,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:43,802 INFO L93 Difference]: Finished difference Result 6278 states and 27208 transitions. [2022-01-18 15:52:43,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 15:52:43,802 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:52:43,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:43,817 INFO L225 Difference]: With dead ends: 6278 [2022-01-18 15:52:43,817 INFO L226 Difference]: Without dead ends: 6253 [2022-01-18 15:52:43,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=287, Invalid=1605, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 15:52:43,818 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 208 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:43,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 476 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1250 Invalid, 0 Unknown, 111 Unchecked, 0.5s Time] [2022-01-18 15:52:43,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6253 states. [2022-01-18 15:52:43,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6253 to 5796. [2022-01-18 15:52:43,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5796 states, 5795 states have (on average 4.378084555651424) internal successors, (25371), 5795 states have internal predecessors, (25371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:43,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5796 states to 5796 states and 25371 transitions. [2022-01-18 15:52:43,912 INFO L78 Accepts]: Start accepts. Automaton has 5796 states and 25371 transitions. Word has length 23 [2022-01-18 15:52:43,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:43,912 INFO L470 AbstractCegarLoop]: Abstraction has 5796 states and 25371 transitions. [2022-01-18 15:52:43,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:43,912 INFO L276 IsEmpty]: Start isEmpty. Operand 5796 states and 25371 transitions. [2022-01-18 15:52:43,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:52:43,922 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:43,922 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:43,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Forceful destruction successful, exit code 0 [2022-01-18 15:52:44,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2022-01-18 15:52:44,122 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:52:44,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:44,123 INFO L85 PathProgramCache]: Analyzing trace with hash -524873628, now seen corresponding path program 161 times [2022-01-18 15:52:44,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:44,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666921640] [2022-01-18 15:52:44,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:44,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:44,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:44,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:44,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:44,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666921640] [2022-01-18 15:52:44,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666921640] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:44,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224064962] [2022-01-18 15:52:44,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:52:44,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:44,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:44,262 INFO L229 MonitoredProcess]: Starting monitored process 277 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:44,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-01-18 15:52:44,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:52:44,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:44,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:52:44,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:44,429 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:44,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:52:44,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:44,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:45,030 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:45,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:52:45,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:45,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:52:45,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:45,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224064962] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:45,081 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:45,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:52:45,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255837076] [2022-01-18 15:52:45,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:45,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:52:45,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:45,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:52:45,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:52:45,081 INFO L87 Difference]: Start difference. First operand 5796 states and 25371 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:46,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:46,141 INFO L93 Difference]: Finished difference Result 6285 states and 27234 transitions. [2022-01-18 15:52:46,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:52:46,142 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:52:46,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:46,156 INFO L225 Difference]: With dead ends: 6285 [2022-01-18 15:52:46,157 INFO L226 Difference]: Without dead ends: 6264 [2022-01-18 15:52:46,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=255, Invalid=1385, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:52:46,157 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 163 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:46,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 533 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1375 Invalid, 0 Unknown, 119 Unchecked, 0.6s Time] [2022-01-18 15:52:46,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6264 states. [2022-01-18 15:52:46,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6264 to 5788. [2022-01-18 15:52:46,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5788 states, 5787 states have (on average 4.378261620874373) internal successors, (25337), 5787 states have internal predecessors, (25337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:46,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5788 states to 5788 states and 25337 transitions. [2022-01-18 15:52:46,252 INFO L78 Accepts]: Start accepts. Automaton has 5788 states and 25337 transitions. Word has length 23 [2022-01-18 15:52:46,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:46,252 INFO L470 AbstractCegarLoop]: Abstraction has 5788 states and 25337 transitions. [2022-01-18 15:52:46,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:46,253 INFO L276 IsEmpty]: Start isEmpty. Operand 5788 states and 25337 transitions. [2022-01-18 15:52:46,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:52:46,262 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:46,262 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:46,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Ended with exit code 0 [2022-01-18 15:52:46,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2022-01-18 15:52:46,463 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:52:46,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:46,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1624571748, now seen corresponding path program 162 times [2022-01-18 15:52:46,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:46,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408433917] [2022-01-18 15:52:46,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:46,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:46,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:46,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:46,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:46,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408433917] [2022-01-18 15:52:46,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408433917] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:46,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176686055] [2022-01-18 15:52:46,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:52:46,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:46,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:46,599 INFO L229 MonitoredProcess]: Starting monitored process 278 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:46,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-01-18 15:52:46,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:52:46,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:46,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 15:52:46,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:46,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:46,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-01-18 15:52:46,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:46,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:47,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:47,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176686055] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:47,197 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:47,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-01-18 15:52:47,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128847675] [2022-01-18 15:52:47,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:47,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:52:47,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:47,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:52:47,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:52:47,197 INFO L87 Difference]: Start difference. First operand 5788 states and 25337 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:48,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:48,704 INFO L93 Difference]: Finished difference Result 7856 states and 33507 transitions. [2022-01-18 15:52:48,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 15:52:48,704 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:52:48,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:48,722 INFO L225 Difference]: With dead ends: 7856 [2022-01-18 15:52:48,723 INFO L226 Difference]: Without dead ends: 7812 [2022-01-18 15:52:48,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=450, Invalid=2202, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 15:52:48,723 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 226 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:48,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 511 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 1251 Invalid, 0 Unknown, 101 Unchecked, 0.7s Time] [2022-01-18 15:52:48,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7812 states. [2022-01-18 15:52:48,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7812 to 5838. [2022-01-18 15:52:48,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5838 states, 5837 states have (on average 4.3834161384272745) internal successors, (25586), 5837 states have internal predecessors, (25586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:48,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5838 states to 5838 states and 25586 transitions. [2022-01-18 15:52:48,833 INFO L78 Accepts]: Start accepts. Automaton has 5838 states and 25586 transitions. Word has length 23 [2022-01-18 15:52:48,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:48,833 INFO L470 AbstractCegarLoop]: Abstraction has 5838 states and 25586 transitions. [2022-01-18 15:52:48,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:48,833 INFO L276 IsEmpty]: Start isEmpty. Operand 5838 states and 25586 transitions. [2022-01-18 15:52:48,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:52:48,843 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:48,843 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:48,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Ended with exit code 0 [2022-01-18 15:52:49,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2022-01-18 15:52:49,044 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:52:49,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:49,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1027383068, now seen corresponding path program 163 times [2022-01-18 15:52:49,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:49,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704919845] [2022-01-18 15:52:49,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:49,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:49,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:49,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704919845] [2022-01-18 15:52:49,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704919845] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:49,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710796267] [2022-01-18 15:52:49,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:52:49,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:49,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:49,231 INFO L229 MonitoredProcess]: Starting monitored process 279 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:49,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-01-18 15:52:49,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:49,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:52:49,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:49,430 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:49,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:52:49,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:49,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:50,034 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:50,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:52:50,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:50,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:52:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:50,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710796267] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:50,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:50,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:52:50,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775674130] [2022-01-18 15:52:50,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:50,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:52:50,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:50,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:52:50,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:52:50,086 INFO L87 Difference]: Start difference. First operand 5838 states and 25586 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:50,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:50,983 INFO L93 Difference]: Finished difference Result 6190 states and 26933 transitions. [2022-01-18 15:52:50,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:52:50,983 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:52:50,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:50,998 INFO L225 Difference]: With dead ends: 6190 [2022-01-18 15:52:50,998 INFO L226 Difference]: Without dead ends: 6164 [2022-01-18 15:52:50,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=240, Invalid=1166, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:52:50,998 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 144 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:50,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 372 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 975 Invalid, 0 Unknown, 90 Unchecked, 0.4s Time] [2022-01-18 15:52:51,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6164 states. [2022-01-18 15:52:51,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6164 to 5845. [2022-01-18 15:52:51,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5845 states, 5844 states have (on average 4.382272416153319) internal successors, (25610), 5844 states have internal predecessors, (25610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:51,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5845 states to 5845 states and 25610 transitions. [2022-01-18 15:52:51,090 INFO L78 Accepts]: Start accepts. Automaton has 5845 states and 25610 transitions. Word has length 23 [2022-01-18 15:52:51,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:51,090 INFO L470 AbstractCegarLoop]: Abstraction has 5845 states and 25610 transitions. [2022-01-18 15:52:51,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:51,090 INFO L276 IsEmpty]: Start isEmpty. Operand 5845 states and 25610 transitions. [2022-01-18 15:52:51,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:52:51,100 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:51,100 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:51,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Ended with exit code 0 [2022-01-18 15:52:51,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2022-01-18 15:52:51,300 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:52:51,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:51,301 INFO L85 PathProgramCache]: Analyzing trace with hash -2068959136, now seen corresponding path program 164 times [2022-01-18 15:52:51,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:51,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989144767] [2022-01-18 15:52:51,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:51,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:51,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:51,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:51,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989144767] [2022-01-18 15:52:51,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989144767] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:51,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77955195] [2022-01-18 15:52:51,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:52:51,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:51,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:51,473 INFO L229 MonitoredProcess]: Starting monitored process 280 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:51,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-01-18 15:52:51,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:52:51,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:51,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:52:51,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:51,750 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:51,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:52:52,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:52,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:53,169 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:53,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:52:53,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:53,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:52:53,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:53,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77955195] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:53,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:53,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:52:53,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819801756] [2022-01-18 15:52:53,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:53,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:52:53,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:53,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:52:53,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:52:53,221 INFO L87 Difference]: Start difference. First operand 5845 states and 25610 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:54,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:54,499 INFO L93 Difference]: Finished difference Result 6178 states and 26893 transitions. [2022-01-18 15:52:54,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:52:54,499 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:52:54,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:54,518 INFO L225 Difference]: With dead ends: 6178 [2022-01-18 15:52:54,518 INFO L226 Difference]: Without dead ends: 6150 [2022-01-18 15:52:54,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=280, Invalid=1360, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:52:54,519 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 162 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:54,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 406 Invalid, 1313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1109 Invalid, 0 Unknown, 115 Unchecked, 0.6s Time] [2022-01-18 15:52:54,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6150 states. [2022-01-18 15:52:54,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6150 to 5838. [2022-01-18 15:52:54,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5838 states, 5837 states have (on average 4.3834161384272745) internal successors, (25586), 5837 states have internal predecessors, (25586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:54,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5838 states to 5838 states and 25586 transitions. [2022-01-18 15:52:54,647 INFO L78 Accepts]: Start accepts. Automaton has 5838 states and 25586 transitions. Word has length 23 [2022-01-18 15:52:54,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:54,647 INFO L470 AbstractCegarLoop]: Abstraction has 5838 states and 25586 transitions. [2022-01-18 15:52:54,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:54,647 INFO L276 IsEmpty]: Start isEmpty. Operand 5838 states and 25586 transitions. [2022-01-18 15:52:54,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:52:54,660 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:54,660 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:54,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Forceful destruction successful, exit code 0 [2022-01-18 15:52:54,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2022-01-18 15:52:54,880 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:52:54,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:54,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1914521618, now seen corresponding path program 165 times [2022-01-18 15:52:54,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:54,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955203395] [2022-01-18 15:52:54,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:54,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:55,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:55,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:55,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955203395] [2022-01-18 15:52:55,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955203395] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:55,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570988624] [2022-01-18 15:52:55,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:52:55,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:55,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:55,079 INFO L229 MonitoredProcess]: Starting monitored process 281 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:55,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-01-18 15:52:55,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:52:55,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:55,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:52:55,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:55,277 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:55,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:52:55,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:55,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:52:56,105 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:56,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:52:56,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:56,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:52:56,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:56,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570988624] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:52:56,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:52:56,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:52:56,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290536353] [2022-01-18 15:52:56,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:52:56,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:52:56,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:52:56,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:52:56,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:52:56,169 INFO L87 Difference]: Start difference. First operand 5838 states and 25586 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:57,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:52:57,183 INFO L93 Difference]: Finished difference Result 6158 states and 26804 transitions. [2022-01-18 15:52:57,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:52:57,183 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:52:57,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:52:57,198 INFO L225 Difference]: With dead ends: 6158 [2022-01-18 15:52:57,198 INFO L226 Difference]: Without dead ends: 6133 [2022-01-18 15:52:57,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=269, Invalid=1453, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:52:57,198 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 182 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:52:57,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 391 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 956 Invalid, 0 Unknown, 87 Unchecked, 0.4s Time] [2022-01-18 15:52:57,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6133 states. [2022-01-18 15:52:57,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6133 to 5842. [2022-01-18 15:52:57,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5842 states, 5841 states have (on average 4.383153569594247) internal successors, (25602), 5841 states have internal predecessors, (25602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:57,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5842 states to 5842 states and 25602 transitions. [2022-01-18 15:52:57,289 INFO L78 Accepts]: Start accepts. Automaton has 5842 states and 25602 transitions. Word has length 23 [2022-01-18 15:52:57,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:52:57,289 INFO L470 AbstractCegarLoop]: Abstraction has 5842 states and 25602 transitions. [2022-01-18 15:52:57,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:52:57,289 INFO L276 IsEmpty]: Start isEmpty. Operand 5842 states and 25602 transitions. [2022-01-18 15:52:57,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:52:57,299 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:52:57,299 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:52:57,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Ended with exit code 0 [2022-01-18 15:52:57,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:57,499 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:52:57,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:52:57,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1367753146, now seen corresponding path program 166 times [2022-01-18 15:52:57,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:52:57,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142787377] [2022-01-18 15:52:57,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:52:57,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:52:57,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:52:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:52:57,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:52:57,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142787377] [2022-01-18 15:52:57,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142787377] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:52:57,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300126931] [2022-01-18 15:52:57,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:52:57,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:52:57,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:52:57,822 INFO L229 MonitoredProcess]: Starting monitored process 282 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:52:57,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-01-18 15:52:57,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:52:57,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:52:57,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:52:57,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:52:58,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:58,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:52:58,135 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:52:58,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 45 [2022-01-18 15:53:01,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:01,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:01,444 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:01,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-01-18 15:53:01,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:01,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300126931] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:01,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:01,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-18 15:53:01,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854437807] [2022-01-18 15:53:01,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:01,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:53:01,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:01,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:53:01,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:53:01,538 INFO L87 Difference]: Start difference. First operand 5842 states and 25602 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:09,290 WARN L228 SmtUtils]: Spent 6.95s on a formula simplification. DAG size of input: 58 DAG size of output: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 15:53:11,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:11,089 INFO L93 Difference]: Finished difference Result 6947 states and 29924 transitions. [2022-01-18 15:53:11,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 15:53:11,090 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:53:11,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:11,109 INFO L225 Difference]: With dead ends: 6947 [2022-01-18 15:53:11,109 INFO L226 Difference]: Without dead ends: 6905 [2022-01-18 15:53:11,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=760, Invalid=3796, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 15:53:11,110 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 297 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 1692 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 2198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 294 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:11,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 680 Invalid, 2198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1692 Invalid, 0 Unknown, 294 Unchecked, 0.9s Time] [2022-01-18 15:53:11,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6905 states. [2022-01-18 15:53:11,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6905 to 5866. [2022-01-18 15:53:11,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5866 states, 5865 states have (on average 4.384143222506394) internal successors, (25713), 5865 states have internal predecessors, (25713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:11,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5866 states to 5866 states and 25713 transitions. [2022-01-18 15:53:11,245 INFO L78 Accepts]: Start accepts. Automaton has 5866 states and 25713 transitions. Word has length 23 [2022-01-18 15:53:11,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:11,245 INFO L470 AbstractCegarLoop]: Abstraction has 5866 states and 25713 transitions. [2022-01-18 15:53:11,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:11,245 INFO L276 IsEmpty]: Start isEmpty. Operand 5866 states and 25713 transitions. [2022-01-18 15:53:11,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:53:11,258 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:11,258 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:53:11,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Forceful destruction successful, exit code 0 [2022-01-18 15:53:11,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2022-01-18 15:53:11,471 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:53:11,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:11,472 INFO L85 PathProgramCache]: Analyzing trace with hash 351638040, now seen corresponding path program 167 times [2022-01-18 15:53:11,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:11,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066842437] [2022-01-18 15:53:11,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:11,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:11,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:11,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:11,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:11,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066842437] [2022-01-18 15:53:11,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066842437] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:11,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037919627] [2022-01-18 15:53:11,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:53:11,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:11,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:11,645 INFO L229 MonitoredProcess]: Starting monitored process 283 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:11,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-01-18 15:53:11,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:53:11,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:11,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:53:11,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:11,856 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:11,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:53:12,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:12,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:12,873 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:12,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:53:12,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:12,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:53:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:12,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037919627] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:12,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:12,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:53:12,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843309518] [2022-01-18 15:53:12,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:12,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:53:12,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:12,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:53:12,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=463, Unknown=2, NotChecked=0, Total=552 [2022-01-18 15:53:12,927 INFO L87 Difference]: Start difference. First operand 5866 states and 25713 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:13,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:13,880 INFO L93 Difference]: Finished difference Result 6104 states and 26608 transitions. [2022-01-18 15:53:13,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:53:13,880 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:53:13,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:13,894 INFO L225 Difference]: With dead ends: 6104 [2022-01-18 15:53:13,894 INFO L226 Difference]: Without dead ends: 6082 [2022-01-18 15:53:13,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=205, Invalid=1275, Unknown=2, NotChecked=0, Total=1482 [2022-01-18 15:53:13,894 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 120 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 1432 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:13,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 638 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1432 Invalid, 0 Unknown, 122 Unchecked, 0.6s Time] [2022-01-18 15:53:13,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6082 states. [2022-01-18 15:53:13,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6082 to 5864. [2022-01-18 15:53:13,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5864 states, 5863 states have (on average 4.3837625788845305) internal successors, (25702), 5863 states have internal predecessors, (25702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:13,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5864 states to 5864 states and 25702 transitions. [2022-01-18 15:53:13,986 INFO L78 Accepts]: Start accepts. Automaton has 5864 states and 25702 transitions. Word has length 23 [2022-01-18 15:53:13,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:13,986 INFO L470 AbstractCegarLoop]: Abstraction has 5864 states and 25702 transitions. [2022-01-18 15:53:13,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:13,986 INFO L276 IsEmpty]: Start isEmpty. Operand 5864 states and 25702 transitions. [2022-01-18 15:53:13,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:53:13,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:13,995 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:53:14,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Ended with exit code 0 [2022-01-18 15:53:14,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2022-01-18 15:53:14,196 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:53:14,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:14,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1183867346, now seen corresponding path program 168 times [2022-01-18 15:53:14,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:14,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769435768] [2022-01-18 15:53:14,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:14,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:14,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:14,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:14,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:14,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769435768] [2022-01-18 15:53:14,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769435768] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:14,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291390592] [2022-01-18 15:53:14,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:53:14,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:14,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:14,348 INFO L229 MonitoredProcess]: Starting monitored process 284 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:14,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-01-18 15:53:14,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:53:14,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:14,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:53:14,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:14,566 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:14,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 42 [2022-01-18 15:53:15,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:15,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:15,446 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:15,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:53:15,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:15,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:53:15,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:15,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291390592] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:15,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:15,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:53:15,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153046578] [2022-01-18 15:53:15,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:15,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:53:15,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:15,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:53:15,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:53:15,498 INFO L87 Difference]: Start difference. First operand 5864 states and 25702 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:16,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:16,202 INFO L93 Difference]: Finished difference Result 6070 states and 26477 transitions. [2022-01-18 15:53:16,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:53:16,202 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:53:16,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:16,216 INFO L225 Difference]: With dead ends: 6070 [2022-01-18 15:53:16,216 INFO L226 Difference]: Without dead ends: 6047 [2022-01-18 15:53:16,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:53:16,217 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 108 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:16,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 529 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1262 Invalid, 0 Unknown, 36 Unchecked, 0.5s Time] [2022-01-18 15:53:16,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6047 states. [2022-01-18 15:53:16,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6047 to 5860. [2022-01-18 15:53:16,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5860 states, 5859 states have (on average 4.384024577572965) internal successors, (25686), 5859 states have internal predecessors, (25686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:16,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5860 states to 5860 states and 25686 transitions. [2022-01-18 15:53:16,310 INFO L78 Accepts]: Start accepts. Automaton has 5860 states and 25686 transitions. Word has length 23 [2022-01-18 15:53:16,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:16,311 INFO L470 AbstractCegarLoop]: Abstraction has 5860 states and 25686 transitions. [2022-01-18 15:53:16,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:16,311 INFO L276 IsEmpty]: Start isEmpty. Operand 5860 states and 25686 transitions. [2022-01-18 15:53:16,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:53:16,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:16,320 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:53:16,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Ended with exit code 0 [2022-01-18 15:53:16,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:16,521 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:53:16,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:16,521 INFO L85 PathProgramCache]: Analyzing trace with hash -512050194, now seen corresponding path program 169 times [2022-01-18 15:53:16,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:16,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079393328] [2022-01-18 15:53:16,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:16,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:16,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:16,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079393328] [2022-01-18 15:53:16,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079393328] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:16,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245792727] [2022-01-18 15:53:16,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:53:16,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:16,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:16,719 INFO L229 MonitoredProcess]: Starting monitored process 285 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:16,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-01-18 15:53:16,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:16,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:53:16,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:16,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:16,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:17,008 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:17,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 46 [2022-01-18 15:53:17,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:17,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:17,515 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:17,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-01-18 15:53:17,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:17,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245792727] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:17,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:17,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-18 15:53:17,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198178074] [2022-01-18 15:53:17,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:17,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:53:17,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:17,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:53:17,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:53:17,610 INFO L87 Difference]: Start difference. First operand 5860 states and 25686 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:20,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:20,061 INFO L93 Difference]: Finished difference Result 7673 states and 32572 transitions. [2022-01-18 15:53:20,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-18 15:53:20,062 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:53:20,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:20,079 INFO L225 Difference]: With dead ends: 7673 [2022-01-18 15:53:20,079 INFO L226 Difference]: Without dead ends: 7629 [2022-01-18 15:53:20,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1492 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=808, Invalid=4448, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 15:53:20,080 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 319 mSDsluCounter, 1445 mSDsCounter, 0 mSdLazyCounter, 2121 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 2726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 2121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 402 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:20,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 989 Invalid, 2726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 2121 Invalid, 0 Unknown, 402 Unchecked, 1.0s Time] [2022-01-18 15:53:20,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7629 states. [2022-01-18 15:53:20,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7629 to 5888. [2022-01-18 15:53:20,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5888 states, 5887 states have (on average 4.385425513844063) internal successors, (25817), 5887 states have internal predecessors, (25817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:20,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5888 states to 5888 states and 25817 transitions. [2022-01-18 15:53:20,189 INFO L78 Accepts]: Start accepts. Automaton has 5888 states and 25817 transitions. Word has length 23 [2022-01-18 15:53:20,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:20,189 INFO L470 AbstractCegarLoop]: Abstraction has 5888 states and 25817 transitions. [2022-01-18 15:53:20,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:20,189 INFO L276 IsEmpty]: Start isEmpty. Operand 5888 states and 25817 transitions. [2022-01-18 15:53:20,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:53:20,199 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:20,199 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:53:20,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Ended with exit code 0 [2022-01-18 15:53:20,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,285 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:20,399 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:53:20,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:20,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1476658, now seen corresponding path program 170 times [2022-01-18 15:53:20,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:20,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898726930] [2022-01-18 15:53:20,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:20,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:20,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:20,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:20,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898726930] [2022-01-18 15:53:20,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898726930] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:20,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388618155] [2022-01-18 15:53:20,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:53:20,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:20,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:20,532 INFO L229 MonitoredProcess]: Starting monitored process 286 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:20,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-01-18 15:53:20,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:53:20,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:20,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:53:20,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:20,702 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:20,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:53:21,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:21,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:21,214 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:21,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:53:21,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:21,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:53:21,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:21,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388618155] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:21,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:21,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:53:21,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737222953] [2022-01-18 15:53:21,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:21,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:53:21,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:21,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:53:21,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:53:21,268 INFO L87 Difference]: Start difference. First operand 5888 states and 25817 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:22,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:22,233 INFO L93 Difference]: Finished difference Result 6271 states and 27269 transitions. [2022-01-18 15:53:22,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:53:22,233 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:53:22,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:22,248 INFO L225 Difference]: With dead ends: 6271 [2022-01-18 15:53:22,248 INFO L226 Difference]: Without dead ends: 6246 [2022-01-18 15:53:22,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=301, Invalid=1505, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 15:53:22,248 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 196 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:22,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 413 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 982 Invalid, 0 Unknown, 91 Unchecked, 0.4s Time] [2022-01-18 15:53:22,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6246 states. [2022-01-18 15:53:22,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6246 to 5892. [2022-01-18 15:53:22,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5892 states, 5891 states have (on average 4.385163809200475) internal successors, (25833), 5891 states have internal predecessors, (25833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:22,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5892 states to 5892 states and 25833 transitions. [2022-01-18 15:53:22,341 INFO L78 Accepts]: Start accepts. Automaton has 5892 states and 25833 transitions. Word has length 23 [2022-01-18 15:53:22,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:22,341 INFO L470 AbstractCegarLoop]: Abstraction has 5892 states and 25833 transitions. [2022-01-18 15:53:22,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:22,342 INFO L276 IsEmpty]: Start isEmpty. Operand 5892 states and 25833 transitions. [2022-01-18 15:53:22,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:53:22,351 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:22,351 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:53:22,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Forceful destruction successful, exit code 0 [2022-01-18 15:53:22,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,286 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:22,551 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:53:22,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:22,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1077187814, now seen corresponding path program 171 times [2022-01-18 15:53:22,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:22,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837620206] [2022-01-18 15:53:22,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:22,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:22,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:22,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:22,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837620206] [2022-01-18 15:53:22,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837620206] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:22,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842265654] [2022-01-18 15:53:22,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:53:22,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:22,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:22,687 INFO L229 MonitoredProcess]: Starting monitored process 287 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:22,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-01-18 15:53:22,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:53:22,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:22,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:53:22,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:22,874 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:22,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:53:23,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:23,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:23,461 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:23,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:53:23,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:23,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:53:23,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:23,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842265654] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:23,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:23,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:53:23,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295186446] [2022-01-18 15:53:23,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:23,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:53:23,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:23,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:53:23,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:53:23,511 INFO L87 Difference]: Start difference. First operand 5892 states and 25833 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:24,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:24,344 INFO L93 Difference]: Finished difference Result 6241 states and 27165 transitions. [2022-01-18 15:53:24,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:53:24,344 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:53:24,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:24,358 INFO L225 Difference]: With dead ends: 6241 [2022-01-18 15:53:24,358 INFO L226 Difference]: Without dead ends: 6220 [2022-01-18 15:53:24,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=246, Invalid=1236, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:53:24,359 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 141 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 1238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:24,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 428 Invalid, 1238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1108 Invalid, 0 Unknown, 66 Unchecked, 0.4s Time] [2022-01-18 15:53:24,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6220 states. [2022-01-18 15:53:24,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6220 to 5888. [2022-01-18 15:53:24,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5888 states, 5887 states have (on average 4.385425513844063) internal successors, (25817), 5887 states have internal predecessors, (25817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:24,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5888 states to 5888 states and 25817 transitions. [2022-01-18 15:53:24,450 INFO L78 Accepts]: Start accepts. Automaton has 5888 states and 25817 transitions. Word has length 23 [2022-01-18 15:53:24,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:24,450 INFO L470 AbstractCegarLoop]: Abstraction has 5888 states and 25817 transitions. [2022-01-18 15:53:24,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:24,450 INFO L276 IsEmpty]: Start isEmpty. Operand 5888 states and 25817 transitions. [2022-01-18 15:53:24,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:53:24,459 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:24,459 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:53:24,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Ended with exit code 0 [2022-01-18 15:53:24,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,287 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:24,660 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:53:24,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:24,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1248002746, now seen corresponding path program 172 times [2022-01-18 15:53:24,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:24,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267673950] [2022-01-18 15:53:24,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:24,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:24,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:24,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:24,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267673950] [2022-01-18 15:53:24,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267673950] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:24,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592002648] [2022-01-18 15:53:24,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:53:24,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:24,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:24,783 INFO L229 MonitoredProcess]: Starting monitored process 288 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:24,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-01-18 15:53:24,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:53:24,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:24,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:53:24,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:24,977 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:24,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:53:25,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:25,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:25,421 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:25,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:53:25,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:25,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:53:25,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:25,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592002648] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:25,473 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:25,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:53:25,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140882544] [2022-01-18 15:53:25,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:25,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:53:25,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:25,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:53:25,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:53:25,474 INFO L87 Difference]: Start difference. First operand 5888 states and 25817 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:26,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:26,216 INFO L93 Difference]: Finished difference Result 6097 states and 26602 transitions. [2022-01-18 15:53:26,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:53:26,216 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:53:26,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:26,230 INFO L225 Difference]: With dead ends: 6097 [2022-01-18 15:53:26,230 INFO L226 Difference]: Without dead ends: 6074 [2022-01-18 15:53:26,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:53:26,230 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 93 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 1358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:26,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 535 Invalid, 1358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1285 Invalid, 0 Unknown, 31 Unchecked, 0.5s Time] [2022-01-18 15:53:26,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6074 states. [2022-01-18 15:53:26,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6074 to 5888. [2022-01-18 15:53:26,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5888 states, 5887 states have (on average 4.385425513844063) internal successors, (25817), 5887 states have internal predecessors, (25817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:26,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5888 states to 5888 states and 25817 transitions. [2022-01-18 15:53:26,326 INFO L78 Accepts]: Start accepts. Automaton has 5888 states and 25817 transitions. Word has length 23 [2022-01-18 15:53:26,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:26,327 INFO L470 AbstractCegarLoop]: Abstraction has 5888 states and 25817 transitions. [2022-01-18 15:53:26,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:26,327 INFO L276 IsEmpty]: Start isEmpty. Operand 5888 states and 25817 transitions. [2022-01-18 15:53:26,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:53:26,337 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:26,337 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:53:26,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Ended with exit code 0 [2022-01-18 15:53:26,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2022-01-18 15:53:26,537 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:53:26,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:26,537 INFO L85 PathProgramCache]: Analyzing trace with hash 11235040, now seen corresponding path program 173 times [2022-01-18 15:53:26,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:26,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748236756] [2022-01-18 15:53:26,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:26,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:26,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:26,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:26,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:26,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748236756] [2022-01-18 15:53:26,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748236756] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:26,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744230789] [2022-01-18 15:53:26,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:53:26,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:26,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:26,661 INFO L229 MonitoredProcess]: Starting monitored process 289 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:26,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-01-18 15:53:26,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:53:26,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:26,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:53:26,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:26,843 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:26,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:53:27,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:27,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:27,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:27,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:53:27,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:27,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:53:27,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:27,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744230789] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:27,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:27,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:53:27,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931360162] [2022-01-18 15:53:27,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:27,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:53:27,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:27,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:53:27,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:53:27,339 INFO L87 Difference]: Start difference. First operand 5888 states and 25817 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:27,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:27,844 INFO L93 Difference]: Finished difference Result 6416 states and 27869 transitions. [2022-01-18 15:53:27,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:53:27,844 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:53:27,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:27,859 INFO L225 Difference]: With dead ends: 6416 [2022-01-18 15:53:27,859 INFO L226 Difference]: Without dead ends: 6394 [2022-01-18 15:53:27,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:53:27,859 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 124 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:27,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 501 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 975 Invalid, 0 Unknown, 138 Unchecked, 0.4s Time] [2022-01-18 15:53:27,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6394 states. [2022-01-18 15:53:27,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6394 to 5888. [2022-01-18 15:53:27,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5888 states, 5887 states have (on average 4.385425513844063) internal successors, (25817), 5887 states have internal predecessors, (25817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:27,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5888 states to 5888 states and 25817 transitions. [2022-01-18 15:53:27,985 INFO L78 Accepts]: Start accepts. Automaton has 5888 states and 25817 transitions. Word has length 23 [2022-01-18 15:53:27,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:27,985 INFO L470 AbstractCegarLoop]: Abstraction has 5888 states and 25817 transitions. [2022-01-18 15:53:27,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:27,985 INFO L276 IsEmpty]: Start isEmpty. Operand 5888 states and 25817 transitions. [2022-01-18 15:53:27,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:53:27,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:27,995 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:53:28,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Forceful destruction successful, exit code 0 [2022-01-18 15:53:28,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable288,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:28,195 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:53:28,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:28,196 INFO L85 PathProgramCache]: Analyzing trace with hash 524761892, now seen corresponding path program 174 times [2022-01-18 15:53:28,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:28,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516555504] [2022-01-18 15:53:28,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:28,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:28,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:28,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:28,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516555504] [2022-01-18 15:53:28,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516555504] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:28,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508852431] [2022-01-18 15:53:28,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:53:28,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:28,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:28,338 INFO L229 MonitoredProcess]: Starting monitored process 290 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:28,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-01-18 15:53:28,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:53:28,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:28,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:53:28,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:28,505 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:28,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:53:28,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:28,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:28,988 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:28,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:53:28,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:28,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:53:29,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:29,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508852431] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:29,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:29,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:53:29,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845907455] [2022-01-18 15:53:29,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:29,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:53:29,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:29,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:53:29,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:53:29,038 INFO L87 Difference]: Start difference. First operand 5888 states and 25817 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:30,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:30,434 INFO L93 Difference]: Finished difference Result 6425 states and 27887 transitions. [2022-01-18 15:53:30,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 15:53:30,434 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:53:30,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:30,449 INFO L225 Difference]: With dead ends: 6425 [2022-01-18 15:53:30,449 INFO L226 Difference]: Without dead ends: 6400 [2022-01-18 15:53:30,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=321, Invalid=1484, Unknown=1, NotChecked=0, Total=1806 [2022-01-18 15:53:30,450 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 198 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 1751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 263 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:30,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 601 Invalid, 1751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1418 Invalid, 0 Unknown, 263 Unchecked, 0.6s Time] [2022-01-18 15:53:30,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6400 states. [2022-01-18 15:53:30,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6400 to 5900. [2022-01-18 15:53:30,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5900 states, 5899 states have (on average 4.384471944397355) internal successors, (25864), 5899 states have internal predecessors, (25864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:30,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5900 states to 5900 states and 25864 transitions. [2022-01-18 15:53:30,544 INFO L78 Accepts]: Start accepts. Automaton has 5900 states and 25864 transitions. Word has length 23 [2022-01-18 15:53:30,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:30,544 INFO L470 AbstractCegarLoop]: Abstraction has 5900 states and 25864 transitions. [2022-01-18 15:53:30,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:30,544 INFO L276 IsEmpty]: Start isEmpty. Operand 5900 states and 25864 transitions. [2022-01-18 15:53:30,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:53:30,554 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:30,554 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:53:30,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Ended with exit code 0 [2022-01-18 15:53:30,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2022-01-18 15:53:30,755 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:53:30,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:30,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1600473048, now seen corresponding path program 175 times [2022-01-18 15:53:30,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:30,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643901481] [2022-01-18 15:53:30,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:30,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:30,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:30,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:30,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:30,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643901481] [2022-01-18 15:53:30,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643901481] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:30,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424636354] [2022-01-18 15:53:30,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:53:30,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:30,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:30,889 INFO L229 MonitoredProcess]: Starting monitored process 291 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:30,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-01-18 15:53:30,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:30,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:53:30,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:31,045 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:31,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:53:31,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:31,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:31,575 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:31,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:53:31,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:31,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:53:31,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:31,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424636354] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:31,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:31,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:53:31,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370895676] [2022-01-18 15:53:31,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:31,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:53:31,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:31,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:53:31,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:53:31,629 INFO L87 Difference]: Start difference. First operand 5900 states and 25864 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:32,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:32,633 INFO L93 Difference]: Finished difference Result 6383 states and 27731 transitions. [2022-01-18 15:53:32,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:53:32,634 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:53:32,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:32,649 INFO L225 Difference]: With dead ends: 6383 [2022-01-18 15:53:32,649 INFO L226 Difference]: Without dead ends: 6362 [2022-01-18 15:53:32,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:53:32,649 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 164 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 1338 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 1518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:32,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 571 Invalid, 1518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1338 Invalid, 0 Unknown, 106 Unchecked, 0.5s Time] [2022-01-18 15:53:32,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6362 states. [2022-01-18 15:53:32,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6362 to 5892. [2022-01-18 15:53:32,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5892 states, 5891 states have (on average 4.384654557800034) internal successors, (25830), 5891 states have internal predecessors, (25830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:32,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5892 states to 5892 states and 25830 transitions. [2022-01-18 15:53:32,775 INFO L78 Accepts]: Start accepts. Automaton has 5892 states and 25830 transitions. Word has length 23 [2022-01-18 15:53:32,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:32,775 INFO L470 AbstractCegarLoop]: Abstraction has 5892 states and 25830 transitions. [2022-01-18 15:53:32,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:32,775 INFO L276 IsEmpty]: Start isEmpty. Operand 5892 states and 25830 transitions. [2022-01-18 15:53:32,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:53:32,785 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:32,785 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:53:32,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Ended with exit code 0 [2022-01-18 15:53:32,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,291 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:32,985 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:53:32,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:32,987 INFO L85 PathProgramCache]: Analyzing trace with hash 420742538, now seen corresponding path program 176 times [2022-01-18 15:53:32,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:32,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846366248] [2022-01-18 15:53:32,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:32,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:32,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:33,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:33,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:33,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846366248] [2022-01-18 15:53:33,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846366248] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:33,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287206220] [2022-01-18 15:53:33,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:53:33,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:33,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:33,110 INFO L229 MonitoredProcess]: Starting monitored process 292 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:33,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-01-18 15:53:33,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:53:33,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:33,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:53:33,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:33,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:33,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:53:33,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:33,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:33,722 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:33,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:53:33,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:33,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:53:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:33,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287206220] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:33,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:33,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:53:33,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977235832] [2022-01-18 15:53:33,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:33,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:53:33,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:33,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:53:33,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:53:33,771 INFO L87 Difference]: Start difference. First operand 5892 states and 25830 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:34,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:34,656 INFO L93 Difference]: Finished difference Result 6666 states and 28844 transitions. [2022-01-18 15:53:34,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:53:34,656 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:53:34,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:34,672 INFO L225 Difference]: With dead ends: 6666 [2022-01-18 15:53:34,672 INFO L226 Difference]: Without dead ends: 6635 [2022-01-18 15:53:34,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=227, Invalid=1179, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:53:34,672 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 183 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 1669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:34,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 556 Invalid, 1669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1397 Invalid, 0 Unknown, 215 Unchecked, 0.6s Time] [2022-01-18 15:53:34,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6635 states. [2022-01-18 15:53:34,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6635 to 5892. [2022-01-18 15:53:34,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5892 states, 5891 states have (on average 4.383296554065524) internal successors, (25822), 5891 states have internal predecessors, (25822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:34,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5892 states to 5892 states and 25822 transitions. [2022-01-18 15:53:34,769 INFO L78 Accepts]: Start accepts. Automaton has 5892 states and 25822 transitions. Word has length 23 [2022-01-18 15:53:34,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:34,769 INFO L470 AbstractCegarLoop]: Abstraction has 5892 states and 25822 transitions. [2022-01-18 15:53:34,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:34,769 INFO L276 IsEmpty]: Start isEmpty. Operand 5892 states and 25822 transitions. [2022-01-18 15:53:34,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:53:34,778 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:34,778 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:53:34,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Forceful destruction successful, exit code 0 [2022-01-18 15:53:34,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,292 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:34,979 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:53:34,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:34,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1008487860, now seen corresponding path program 177 times [2022-01-18 15:53:34,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:34,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023104021] [2022-01-18 15:53:34,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:34,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:34,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:35,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:35,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:35,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023104021] [2022-01-18 15:53:35,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023104021] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:35,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199098638] [2022-01-18 15:53:35,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:53:35,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:35,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:35,115 INFO L229 MonitoredProcess]: Starting monitored process 293 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:35,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-01-18 15:53:35,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:53:35,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:35,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 15:53:35,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:35,305 INFO L353 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2022-01-18 15:53:35,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 51 [2022-01-18 15:53:35,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:35,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:35,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:53:35,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199098638] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:35,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:35,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-01-18 15:53:35,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741186150] [2022-01-18 15:53:35,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:35,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:53:35,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:35,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:53:35,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:53:35,651 INFO L87 Difference]: Start difference. First operand 5892 states and 25822 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:37,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:37,322 INFO L93 Difference]: Finished difference Result 7442 states and 32025 transitions. [2022-01-18 15:53:37,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 15:53:37,322 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:53:37,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:37,340 INFO L225 Difference]: With dead ends: 7442 [2022-01-18 15:53:37,340 INFO L226 Difference]: Without dead ends: 7390 [2022-01-18 15:53:37,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=385, Invalid=2371, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 15:53:37,340 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 329 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 1808 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 1941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:37,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 672 Invalid, 1941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1808 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 15:53:37,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7390 states. [2022-01-18 15:53:37,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7390 to 5986. [2022-01-18 15:53:37,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5986 states, 5985 states have (on average 4.393650793650794) internal successors, (26296), 5985 states have internal predecessors, (26296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:37,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5986 states to 5986 states and 26296 transitions. [2022-01-18 15:53:37,474 INFO L78 Accepts]: Start accepts. Automaton has 5986 states and 26296 transitions. Word has length 23 [2022-01-18 15:53:37,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:37,474 INFO L470 AbstractCegarLoop]: Abstraction has 5986 states and 26296 transitions. [2022-01-18 15:53:37,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:37,474 INFO L276 IsEmpty]: Start isEmpty. Operand 5986 states and 26296 transitions. [2022-01-18 15:53:37,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:53:37,484 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:37,484 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:53:37,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Forceful destruction successful, exit code 0 [2022-01-18 15:53:37,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2022-01-18 15:53:37,684 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:53:37,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:37,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1049543050, now seen corresponding path program 178 times [2022-01-18 15:53:37,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:37,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921960752] [2022-01-18 15:53:37,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:37,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:37,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:37,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:37,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921960752] [2022-01-18 15:53:37,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921960752] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:37,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021357164] [2022-01-18 15:53:37,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:53:37,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:37,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:37,808 INFO L229 MonitoredProcess]: Starting monitored process 294 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:37,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-01-18 15:53:37,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:53:37,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:37,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:53:37,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:38,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:38,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:38,065 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:38,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 46 [2022-01-18 15:53:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:42,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:42,940 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:42,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-01-18 15:53:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:43,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021357164] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:43,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:43,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-18 15:53:43,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168997662] [2022-01-18 15:53:43,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:43,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:53:43,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:43,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:53:43,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:53:43,037 INFO L87 Difference]: Start difference. First operand 5986 states and 26296 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:50,079 WARN L228 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 15:53:51,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:51,342 INFO L93 Difference]: Finished difference Result 9748 states and 41169 transitions. [2022-01-18 15:53:51,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-18 15:53:51,343 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:53:51,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:51,366 INFO L225 Difference]: With dead ends: 9748 [2022-01-18 15:53:51,366 INFO L226 Difference]: Without dead ends: 9702 [2022-01-18 15:53:51,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1439 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=761, Invalid=4351, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 15:53:51,367 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 390 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 2154 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 2891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 2154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 492 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:51,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 984 Invalid, 2891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 2154 Invalid, 0 Unknown, 492 Unchecked, 1.0s Time] [2022-01-18 15:53:51,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9702 states. [2022-01-18 15:53:51,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9702 to 6014. [2022-01-18 15:53:51,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6014 states, 6013 states have (on average 4.395310161317147) internal successors, (26429), 6013 states have internal predecessors, (26429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:51,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6014 states to 6014 states and 26429 transitions. [2022-01-18 15:53:51,492 INFO L78 Accepts]: Start accepts. Automaton has 6014 states and 26429 transitions. Word has length 23 [2022-01-18 15:53:51,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:51,493 INFO L470 AbstractCegarLoop]: Abstraction has 6014 states and 26429 transitions. [2022-01-18 15:53:51,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:51,493 INFO L276 IsEmpty]: Start isEmpty. Operand 6014 states and 26429 transitions. [2022-01-18 15:53:51,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:53:51,503 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:51,503 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:53:51,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Forceful destruction successful, exit code 0 [2022-01-18 15:53:51,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,294 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:51,703 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:53:51,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:51,703 INFO L85 PathProgramCache]: Analyzing trace with hash -536016198, now seen corresponding path program 179 times [2022-01-18 15:53:51,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:51,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325982502] [2022-01-18 15:53:51,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:51,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:51,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:51,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:51,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325982502] [2022-01-18 15:53:51,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325982502] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:51,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411668842] [2022-01-18 15:53:51,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:53:51,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:51,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:51,843 INFO L229 MonitoredProcess]: Starting monitored process 295 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:51,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-01-18 15:53:51,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:53:51,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:51,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:53:51,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:52,016 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:52,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:53:52,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:52,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:52,546 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:52,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:53:52,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:52,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:53:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:52,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411668842] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:52,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:52,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:53:52,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726104634] [2022-01-18 15:53:52,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:52,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:53:52,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:52,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:53:52,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:53:52,598 INFO L87 Difference]: Start difference. First operand 6014 states and 26429 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:53,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:53,624 INFO L93 Difference]: Finished difference Result 6431 states and 28030 transitions. [2022-01-18 15:53:53,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 15:53:53,625 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:53:53,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:53,639 INFO L225 Difference]: With dead ends: 6431 [2022-01-18 15:53:53,640 INFO L226 Difference]: Without dead ends: 6406 [2022-01-18 15:53:53,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=265, Invalid=1457, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:53:53,640 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 180 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:53,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 473 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1170 Invalid, 0 Unknown, 75 Unchecked, 0.5s Time] [2022-01-18 15:53:53,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6406 states. [2022-01-18 15:53:53,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6406 to 6018. [2022-01-18 15:53:53,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6018 states, 6017 states have (on average 4.395047365796909) internal successors, (26445), 6017 states have internal predecessors, (26445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:53,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6018 states to 6018 states and 26445 transitions. [2022-01-18 15:53:53,735 INFO L78 Accepts]: Start accepts. Automaton has 6018 states and 26445 transitions. Word has length 23 [2022-01-18 15:53:53,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:53,735 INFO L470 AbstractCegarLoop]: Abstraction has 6018 states and 26445 transitions. [2022-01-18 15:53:53,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:53,735 INFO L276 IsEmpty]: Start isEmpty. Operand 6018 states and 26445 transitions. [2022-01-18 15:53:53,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:53:53,745 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:53,745 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:53:53,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Ended with exit code 0 [2022-01-18 15:53:53,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,295 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:53,945 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:53:53,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:53,945 INFO L85 PathProgramCache]: Analyzing trace with hash 539694958, now seen corresponding path program 180 times [2022-01-18 15:53:53,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:53,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057354294] [2022-01-18 15:53:53,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:53,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:53,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:54,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:54,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:54,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057354294] [2022-01-18 15:53:54,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057354294] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:54,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52200065] [2022-01-18 15:53:54,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:53:54,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:54,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:54,079 INFO L229 MonitoredProcess]: Starting monitored process 296 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:54,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-01-18 15:53:54,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:53:54,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:54,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:53:54,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:54,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:54,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:53:54,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:54,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:54,843 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:54,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:53:54,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:54,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:53:54,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:54,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52200065] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:54,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:54,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:53:54,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122273682] [2022-01-18 15:53:54,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:54,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:53:54,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:54,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:53:54,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:53:54,897 INFO L87 Difference]: Start difference. First operand 6018 states and 26445 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:55,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:55,892 INFO L93 Difference]: Finished difference Result 6450 states and 28101 transitions. [2022-01-18 15:53:55,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:53:55,892 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:53:55,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:55,908 INFO L225 Difference]: With dead ends: 6450 [2022-01-18 15:53:55,908 INFO L226 Difference]: Without dead ends: 6429 [2022-01-18 15:53:55,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=257, Invalid=1303, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:53:55,908 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 142 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:55,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 463 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1270 Invalid, 0 Unknown, 170 Unchecked, 0.5s Time] [2022-01-18 15:53:55,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6429 states. [2022-01-18 15:53:55,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6429 to 6014. [2022-01-18 15:53:55,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6014 states, 6013 states have (on average 4.395310161317147) internal successors, (26429), 6013 states have internal predecessors, (26429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:56,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6014 states to 6014 states and 26429 transitions. [2022-01-18 15:53:56,003 INFO L78 Accepts]: Start accepts. Automaton has 6014 states and 26429 transitions. Word has length 23 [2022-01-18 15:53:56,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:56,004 INFO L470 AbstractCegarLoop]: Abstraction has 6014 states and 26429 transitions. [2022-01-18 15:53:56,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:56,004 INFO L276 IsEmpty]: Start isEmpty. Operand 6014 states and 26429 transitions. [2022-01-18 15:53:56,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:53:56,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:56,013 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:53:56,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Ended with exit code 0 [2022-01-18 15:53:56,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,296 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:56,214 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:53:56,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:56,214 INFO L85 PathProgramCache]: Analyzing trace with hash 710509890, now seen corresponding path program 181 times [2022-01-18 15:53:56,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:56,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687473812] [2022-01-18 15:53:56,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:56,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:56,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:56,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:56,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687473812] [2022-01-18 15:53:56,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687473812] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:56,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866760479] [2022-01-18 15:53:56,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:53:56,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:56,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:56,340 INFO L229 MonitoredProcess]: Starting monitored process 297 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:56,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-01-18 15:53:56,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:56,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:53:56,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:56,533 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:56,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:53:57,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:57,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:57,236 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:57,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:53:57,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:57,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:53:57,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:57,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866760479] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:57,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:57,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:53:57,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411857355] [2022-01-18 15:53:57,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:57,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:53:57,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:57,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:53:57,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:53:57,288 INFO L87 Difference]: Start difference. First operand 6014 states and 26429 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:57,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:53:57,892 INFO L93 Difference]: Finished difference Result 6304 states and 27539 transitions. [2022-01-18 15:53:57,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:53:57,893 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:53:57,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:53:57,907 INFO L225 Difference]: With dead ends: 6304 [2022-01-18 15:53:57,907 INFO L226 Difference]: Without dead ends: 6281 [2022-01-18 15:53:57,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:53:57,907 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 114 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:53:57,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 431 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 970 Invalid, 0 Unknown, 129 Unchecked, 0.4s Time] [2022-01-18 15:53:57,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6281 states. [2022-01-18 15:53:57,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6281 to 6014. [2022-01-18 15:53:57,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6014 states, 6013 states have (on average 4.395310161317147) internal successors, (26429), 6013 states have internal predecessors, (26429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:58,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6014 states to 6014 states and 26429 transitions. [2022-01-18 15:53:58,000 INFO L78 Accepts]: Start accepts. Automaton has 6014 states and 26429 transitions. Word has length 23 [2022-01-18 15:53:58,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:53:58,000 INFO L470 AbstractCegarLoop]: Abstraction has 6014 states and 26429 transitions. [2022-01-18 15:53:58,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:53:58,000 INFO L276 IsEmpty]: Start isEmpty. Operand 6014 states and 26429 transitions. [2022-01-18 15:53:58,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:53:58,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:53:58,010 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:53:58,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Ended with exit code 0 [2022-01-18 15:53:58,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,297 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:58,211 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:53:58,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:53:58,211 INFO L85 PathProgramCache]: Analyzing trace with hash -111062674, now seen corresponding path program 182 times [2022-01-18 15:53:58,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:53:58,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300338299] [2022-01-18 15:53:58,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:53:58,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:53:58,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:53:58,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:58,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:53:58,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300338299] [2022-01-18 15:53:58,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300338299] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:53:58,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818341717] [2022-01-18 15:53:58,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:53:58,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:53:58,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:53:58,338 INFO L229 MonitoredProcess]: Starting monitored process 298 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:53:58,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-01-18 15:53:58,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:53:58,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:53:58,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:53:58,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:53:58,515 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:58,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:53:58,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:58,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:53:58,976 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:53:58,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:53:58,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:53:58,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:53:59,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:53:59,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818341717] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:53:59,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:53:59,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2022-01-18 15:53:59,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829713326] [2022-01-18 15:53:59,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:53:59,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:53:59,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:53:59,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:53:59,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:53:59,030 INFO L87 Difference]: Start difference. First operand 6014 states and 26429 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:00,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:00,911 INFO L93 Difference]: Finished difference Result 7677 states and 32951 transitions. [2022-01-18 15:54:00,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 15:54:00,911 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:54:00,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:00,929 INFO L225 Difference]: With dead ends: 7677 [2022-01-18 15:54:00,929 INFO L226 Difference]: Without dead ends: 7633 [2022-01-18 15:54:00,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=372, Invalid=2384, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 15:54:00,930 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 399 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 1932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:00,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 755 Invalid, 1932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1647 Invalid, 0 Unknown, 154 Unchecked, 0.7s Time] [2022-01-18 15:54:00,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7633 states. [2022-01-18 15:54:01,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7633 to 6026. [2022-01-18 15:54:01,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6026 states, 6025 states have (on average 4.39701244813278) internal successors, (26492), 6025 states have internal predecessors, (26492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:01,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6026 states to 6026 states and 26492 transitions. [2022-01-18 15:54:01,035 INFO L78 Accepts]: Start accepts. Automaton has 6026 states and 26492 transitions. Word has length 23 [2022-01-18 15:54:01,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:01,035 INFO L470 AbstractCegarLoop]: Abstraction has 6026 states and 26492 transitions. [2022-01-18 15:54:01,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:01,035 INFO L276 IsEmpty]: Start isEmpty. Operand 6026 states and 26492 transitions. [2022-01-18 15:54:01,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:54:01,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:01,045 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:01,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Forceful destruction successful, exit code 0 [2022-01-18 15:54:01,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,298 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:01,246 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:54:01,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:01,246 INFO L85 PathProgramCache]: Analyzing trace with hash 474271278, now seen corresponding path program 183 times [2022-01-18 15:54:01,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:01,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340740269] [2022-01-18 15:54:01,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:01,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:01,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:01,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:54:01,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:01,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340740269] [2022-01-18 15:54:01,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340740269] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:01,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102919159] [2022-01-18 15:54:01,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:54:01,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:01,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:01,382 INFO L229 MonitoredProcess]: Starting monitored process 299 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:01,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-01-18 15:54:01,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:54:01,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:01,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 15:54:01,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:01,516 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 15:54:01,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 59 [2022-01-18 15:54:01,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:01,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:01,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-01-18 15:54:02,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:02,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102919159] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:02,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:02,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2022-01-18 15:54:02,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740749193] [2022-01-18 15:54:02,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:02,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:54:02,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:02,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:54:02,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:54:02,013 INFO L87 Difference]: Start difference. First operand 6026 states and 26492 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:03,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:03,396 INFO L93 Difference]: Finished difference Result 6871 states and 29751 transitions. [2022-01-18 15:54:03,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 15:54:03,397 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:54:03,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:03,413 INFO L225 Difference]: With dead ends: 6871 [2022-01-18 15:54:03,413 INFO L226 Difference]: Without dead ends: 6845 [2022-01-18 15:54:03,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=434, Invalid=1918, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 15:54:03,413 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 454 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:03,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 484 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1181 Invalid, 0 Unknown, 78 Unchecked, 0.5s Time] [2022-01-18 15:54:03,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6845 states. [2022-01-18 15:54:03,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6845 to 6046. [2022-01-18 15:54:03,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6046 states, 6045 states have (on average 4.397353184449958) internal successors, (26582), 6045 states have internal predecessors, (26582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:03,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6046 states to 6046 states and 26582 transitions. [2022-01-18 15:54:03,512 INFO L78 Accepts]: Start accepts. Automaton has 6046 states and 26582 transitions. Word has length 23 [2022-01-18 15:54:03,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:03,512 INFO L470 AbstractCegarLoop]: Abstraction has 6046 states and 26582 transitions. [2022-01-18 15:54:03,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:03,512 INFO L276 IsEmpty]: Start isEmpty. Operand 6046 states and 26582 transitions. [2022-01-18 15:54:03,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:54:03,522 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:03,522 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:03,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Forceful destruction successful, exit code 0 [2022-01-18 15:54:03,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,299 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:03,723 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:54:03,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:03,724 INFO L85 PathProgramCache]: Analyzing trace with hash 2087838012, now seen corresponding path program 184 times [2022-01-18 15:54:03,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:03,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432756281] [2022-01-18 15:54:03,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:03,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:03,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:54:03,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:03,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432756281] [2022-01-18 15:54:03,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432756281] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:03,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107516911] [2022-01-18 15:54:03,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:54:03,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:03,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:03,850 INFO L229 MonitoredProcess]: Starting monitored process 300 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:03,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2022-01-18 15:54:03,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:54:03,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:03,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:54:03,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:04,000 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:04,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:54:04,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:04,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:04,557 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:04,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:54:04,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:04,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:54:04,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:04,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107516911] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:04,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:04,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2022-01-18 15:54:04,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843671888] [2022-01-18 15:54:04,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:04,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:54:04,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:04,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:54:04,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:54:04,609 INFO L87 Difference]: Start difference. First operand 6046 states and 26582 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:05,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:05,839 INFO L93 Difference]: Finished difference Result 7220 states and 31160 transitions. [2022-01-18 15:54:05,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 15:54:05,839 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:54:05,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:05,856 INFO L225 Difference]: With dead ends: 7220 [2022-01-18 15:54:05,856 INFO L226 Difference]: Without dead ends: 7178 [2022-01-18 15:54:05,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=271, Invalid=1369, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:54:05,857 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 279 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 1327 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:05,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 579 Invalid, 1636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1327 Invalid, 0 Unknown, 207 Unchecked, 0.6s Time] [2022-01-18 15:54:05,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7178 states. [2022-01-18 15:54:05,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7178 to 6066. [2022-01-18 15:54:05,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6066 states, 6065 states have (on average 4.397361912613356) internal successors, (26670), 6065 states have internal predecessors, (26670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:05,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6066 states to 6066 states and 26670 transitions. [2022-01-18 15:54:05,965 INFO L78 Accepts]: Start accepts. Automaton has 6066 states and 26670 transitions. Word has length 23 [2022-01-18 15:54:05,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:05,965 INFO L470 AbstractCegarLoop]: Abstraction has 6066 states and 26670 transitions. [2022-01-18 15:54:05,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:05,965 INFO L276 IsEmpty]: Start isEmpty. Operand 6066 states and 26670 transitions. [2022-01-18 15:54:05,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:54:05,975 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:05,975 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:05,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Ended with exit code 0 [2022-01-18 15:54:06,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,300 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:06,176 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:54:06,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:06,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1933400494, now seen corresponding path program 185 times [2022-01-18 15:54:06,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:06,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578948437] [2022-01-18 15:54:06,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:06,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:54:06,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:06,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578948437] [2022-01-18 15:54:06,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578948437] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:06,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728345690] [2022-01-18 15:54:06,324 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:54:06,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:06,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:06,325 INFO L229 MonitoredProcess]: Starting monitored process 301 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:06,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2022-01-18 15:54:06,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:54:06,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:06,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:54:06,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:06,482 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:06,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:54:06,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:06,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:07,048 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:07,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:54:07,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:07,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:54:07,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:07,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728345690] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:07,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:07,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2022-01-18 15:54:07,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955445293] [2022-01-18 15:54:07,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:07,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:54:07,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:07,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:54:07,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:54:07,101 INFO L87 Difference]: Start difference. First operand 6066 states and 26670 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:08,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:08,822 INFO L93 Difference]: Finished difference Result 7354 states and 31662 transitions. [2022-01-18 15:54:08,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 15:54:08,822 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:54:08,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:08,839 INFO L225 Difference]: With dead ends: 7354 [2022-01-18 15:54:08,839 INFO L226 Difference]: Without dead ends: 7312 [2022-01-18 15:54:08,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=389, Invalid=2161, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 15:54:08,840 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 342 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 1860 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 2281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 289 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:08,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 798 Invalid, 2281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1860 Invalid, 0 Unknown, 289 Unchecked, 0.8s Time] [2022-01-18 15:54:08,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7312 states. [2022-01-18 15:54:08,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7312 to 6082. [2022-01-18 15:54:08,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6082 states, 6081 states have (on average 4.398125308337445) internal successors, (26745), 6081 states have internal predecessors, (26745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:08,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6082 states to 6082 states and 26745 transitions. [2022-01-18 15:54:08,944 INFO L78 Accepts]: Start accepts. Automaton has 6082 states and 26745 transitions. Word has length 23 [2022-01-18 15:54:08,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:08,944 INFO L470 AbstractCegarLoop]: Abstraction has 6082 states and 26745 transitions. [2022-01-18 15:54:08,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:08,944 INFO L276 IsEmpty]: Start isEmpty. Operand 6082 states and 26745 transitions. [2022-01-18 15:54:08,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:54:08,954 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:08,954 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:08,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Forceful destruction successful, exit code 0 [2022-01-18 15:54:09,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 301 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2022-01-18 15:54:09,154 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:54:09,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:09,155 INFO L85 PathProgramCache]: Analyzing trace with hash 2069650482, now seen corresponding path program 186 times [2022-01-18 15:54:09,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:09,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019325312] [2022-01-18 15:54:09,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:09,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:09,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:09,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:09,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019325312] [2022-01-18 15:54:09,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019325312] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:09,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777216259] [2022-01-18 15:54:09,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:54:09,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:09,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:09,293 INFO L229 MonitoredProcess]: Starting monitored process 302 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:09,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2022-01-18 15:54:09,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:54:09,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:09,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 15:54:09,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:09,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:09,514 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 15:54:09,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 48 [2022-01-18 15:54:09,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:09,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:09,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:09,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777216259] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:09,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:09,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:54:09,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092216063] [2022-01-18 15:54:09,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:09,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:54:09,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:09,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:54:09,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:54:09,817 INFO L87 Difference]: Start difference. First operand 6082 states and 26745 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:12,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:12,173 INFO L93 Difference]: Finished difference Result 8454 states and 35958 transitions. [2022-01-18 15:54:12,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 15:54:12,173 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:54:12,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:12,193 INFO L225 Difference]: With dead ends: 8454 [2022-01-18 15:54:12,194 INFO L226 Difference]: Without dead ends: 8401 [2022-01-18 15:54:12,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=659, Invalid=3897, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 15:54:12,194 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 578 mSDsluCounter, 1173 mSDsCounter, 0 mSdLazyCounter, 1814 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 2054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 1814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:12,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 698 Invalid, 2054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 1814 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 15:54:12,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8401 states. [2022-01-18 15:54:12,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8401 to 6108. [2022-01-18 15:54:12,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6108 states, 6107 states have (on average 4.400032749304077) internal successors, (26871), 6107 states have internal predecessors, (26871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:12,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6108 states to 6108 states and 26871 transitions. [2022-01-18 15:54:12,341 INFO L78 Accepts]: Start accepts. Automaton has 6108 states and 26871 transitions. Word has length 23 [2022-01-18 15:54:12,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:12,341 INFO L470 AbstractCegarLoop]: Abstraction has 6108 states and 26871 transitions. [2022-01-18 15:54:12,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:12,341 INFO L276 IsEmpty]: Start isEmpty. Operand 6108 states and 26871 transitions. [2022-01-18 15:54:12,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:54:12,351 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:12,351 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:12,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Forceful destruction successful, exit code 0 [2022-01-18 15:54:12,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2022-01-18 15:54:12,552 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:54:12,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:12,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1639982862, now seen corresponding path program 187 times [2022-01-18 15:54:12,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:12,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505862670] [2022-01-18 15:54:12,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:12,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:12,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:12,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:12,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:12,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505862670] [2022-01-18 15:54:12,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505862670] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:12,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523341273] [2022-01-18 15:54:12,725 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:54:12,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:12,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:12,726 INFO L229 MonitoredProcess]: Starting monitored process 303 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:12,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2022-01-18 15:54:12,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:12,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:54:12,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:12,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:12,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:54:13,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:13,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:13,404 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:13,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:54:13,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:13,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:54:13,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:13,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523341273] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:13,456 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:13,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:54:13,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36435246] [2022-01-18 15:54:13,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:13,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:54:13,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:13,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:54:13,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:54:13,456 INFO L87 Difference]: Start difference. First operand 6108 states and 26871 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:15,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:15,458 INFO L93 Difference]: Finished difference Result 7121 states and 30779 transitions. [2022-01-18 15:54:15,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 15:54:15,458 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:54:15,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:15,477 INFO L225 Difference]: With dead ends: 7121 [2022-01-18 15:54:15,478 INFO L226 Difference]: Without dead ends: 7069 [2022-01-18 15:54:15,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=413, Invalid=2449, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 15:54:15,478 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 250 mSDsluCounter, 1556 mSDsCounter, 0 mSdLazyCounter, 2564 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 2801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 2564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:15,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 940 Invalid, 2801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 2564 Invalid, 0 Unknown, 119 Unchecked, 1.1s Time] [2022-01-18 15:54:15,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7069 states. [2022-01-18 15:54:15,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7069 to 6114. [2022-01-18 15:54:15,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6114 states, 6113 states have (on average 4.400130868640602) internal successors, (26898), 6113 states have internal predecessors, (26898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:15,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6114 states to 6114 states and 26898 transitions. [2022-01-18 15:54:15,592 INFO L78 Accepts]: Start accepts. Automaton has 6114 states and 26898 transitions. Word has length 23 [2022-01-18 15:54:15,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:15,592 INFO L470 AbstractCegarLoop]: Abstraction has 6114 states and 26898 transitions. [2022-01-18 15:54:15,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:15,593 INFO L276 IsEmpty]: Start isEmpty. Operand 6114 states and 26898 transitions. [2022-01-18 15:54:15,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:54:15,604 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:15,604 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:15,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Forceful destruction successful, exit code 0 [2022-01-18 15:54:15,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2022-01-18 15:54:15,804 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:54:15,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:15,805 INFO L85 PathProgramCache]: Analyzing trace with hash -26416128, now seen corresponding path program 188 times [2022-01-18 15:54:15,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:15,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700396604] [2022-01-18 15:54:15,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:15,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:15,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:15,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:15,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:15,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700396604] [2022-01-18 15:54:15,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700396604] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:15,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725562746] [2022-01-18 15:54:15,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:54:15,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:15,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:15,957 INFO L229 MonitoredProcess]: Starting monitored process 304 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:15,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2022-01-18 15:54:15,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:54:15,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:15,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:54:15,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:16,138 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:16,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:54:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:16,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:16,781 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:16,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:54:16,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:16,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:54:16,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:16,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725562746] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:16,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:16,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:54:16,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653380901] [2022-01-18 15:54:16,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:16,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:54:16,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:16,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:54:16,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:54:16,842 INFO L87 Difference]: Start difference. First operand 6114 states and 26898 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:18,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:18,356 INFO L93 Difference]: Finished difference Result 7031 states and 30451 transitions. [2022-01-18 15:54:18,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 15:54:18,357 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:54:18,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:18,375 INFO L225 Difference]: With dead ends: 7031 [2022-01-18 15:54:18,375 INFO L226 Difference]: Without dead ends: 6989 [2022-01-18 15:54:18,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=322, Invalid=1840, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 15:54:18,376 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 265 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 1768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:18,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 601 Invalid, 1768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1392 Invalid, 0 Unknown, 250 Unchecked, 0.6s Time] [2022-01-18 15:54:18,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6989 states. [2022-01-18 15:54:18,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6989 to 6110. [2022-01-18 15:54:18,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6110 states, 6109 states have (on average 4.400065477164839) internal successors, (26880), 6109 states have internal predecessors, (26880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:18,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6110 states to 6110 states and 26880 transitions. [2022-01-18 15:54:18,495 INFO L78 Accepts]: Start accepts. Automaton has 6110 states and 26880 transitions. Word has length 23 [2022-01-18 15:54:18,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:18,496 INFO L470 AbstractCegarLoop]: Abstraction has 6110 states and 26880 transitions. [2022-01-18 15:54:18,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:18,496 INFO L276 IsEmpty]: Start isEmpty. Operand 6110 states and 26880 transitions. [2022-01-18 15:54:18,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:54:18,507 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:18,507 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:18,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Ended with exit code 0 [2022-01-18 15:54:18,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,304 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:18,707 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:54:18,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:18,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1842429102, now seen corresponding path program 189 times [2022-01-18 15:54:18,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:18,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575266164] [2022-01-18 15:54:18,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:18,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:18,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:18,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:18,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:18,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575266164] [2022-01-18 15:54:18,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575266164] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:18,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030532415] [2022-01-18 15:54:18,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:54:18,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:18,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:18,843 INFO L229 MonitoredProcess]: Starting monitored process 305 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:18,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2022-01-18 15:54:18,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:54:18,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:18,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:54:18,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:19,030 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:19,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2022-01-18 15:54:19,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:19,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:19,519 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:19,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:54:19,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:19,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:54:19,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:19,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030532415] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:19,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:19,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:54:19,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693973156] [2022-01-18 15:54:19,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:19,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:54:19,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:19,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:54:19,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:54:19,577 INFO L87 Difference]: Start difference. First operand 6110 states and 26880 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:21,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:21,690 INFO L93 Difference]: Finished difference Result 8146 states and 34910 transitions. [2022-01-18 15:54:21,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 15:54:21,690 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:54:21,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:21,711 INFO L225 Difference]: With dead ends: 8146 [2022-01-18 15:54:21,711 INFO L226 Difference]: Without dead ends: 8100 [2022-01-18 15:54:21,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=498, Invalid=3284, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 15:54:21,712 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 383 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 2061 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 2616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 2061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 385 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:21,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 861 Invalid, 2616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 2061 Invalid, 0 Unknown, 385 Unchecked, 0.9s Time] [2022-01-18 15:54:21,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8100 states. [2022-01-18 15:54:21,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8100 to 6130. [2022-01-18 15:54:21,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6130 states, 6129 states have (on average 4.403328438570729) internal successors, (26988), 6129 states have internal predecessors, (26988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:21,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6130 states to 6130 states and 26988 transitions. [2022-01-18 15:54:21,827 INFO L78 Accepts]: Start accepts. Automaton has 6130 states and 26988 transitions. Word has length 23 [2022-01-18 15:54:21,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:21,828 INFO L470 AbstractCegarLoop]: Abstraction has 6130 states and 26988 transitions. [2022-01-18 15:54:21,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:21,828 INFO L276 IsEmpty]: Start isEmpty. Operand 6130 states and 26988 transitions. [2022-01-18 15:54:21,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:54:21,839 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:21,839 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:21,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Forceful destruction successful, exit code 0 [2022-01-18 15:54:22,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2022-01-18 15:54:22,040 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:54:22,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:22,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1939011342, now seen corresponding path program 190 times [2022-01-18 15:54:22,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:22,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755415163] [2022-01-18 15:54:22,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:22,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:22,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:22,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:22,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:22,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755415163] [2022-01-18 15:54:22,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755415163] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:22,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353758844] [2022-01-18 15:54:22,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:54:22,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:22,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:22,201 INFO L229 MonitoredProcess]: Starting monitored process 306 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:22,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2022-01-18 15:54:22,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:54:22,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:22,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:54:22,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:22,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:22,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:54:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:22,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:22,929 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:22,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:54:22,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:22,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:54:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:22,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353758844] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:22,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:22,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:54:22,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121444047] [2022-01-18 15:54:22,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:22,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:54:22,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:22,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:54:22,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:54:22,985 INFO L87 Difference]: Start difference. First operand 6130 states and 26988 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:24,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:24,553 INFO L93 Difference]: Finished difference Result 7999 states and 34349 transitions. [2022-01-18 15:54:24,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 15:54:24,553 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:54:24,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:24,574 INFO L225 Difference]: With dead ends: 7999 [2022-01-18 15:54:24,574 INFO L226 Difference]: Without dead ends: 7946 [2022-01-18 15:54:24,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=325, Invalid=2027, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 15:54:24,574 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 342 mSDsluCounter, 1207 mSDsCounter, 0 mSdLazyCounter, 1816 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 2005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:24,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 708 Invalid, 2005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1816 Invalid, 0 Unknown, 50 Unchecked, 0.8s Time] [2022-01-18 15:54:24,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7946 states. [2022-01-18 15:54:24,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7946 to 6136. [2022-01-18 15:54:24,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6136 states, 6135 states have (on average 4.403422982885085) internal successors, (27015), 6135 states have internal predecessors, (27015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:24,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6136 states to 6136 states and 27015 transitions. [2022-01-18 15:54:24,693 INFO L78 Accepts]: Start accepts. Automaton has 6136 states and 27015 transitions. Word has length 23 [2022-01-18 15:54:24,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:24,693 INFO L470 AbstractCegarLoop]: Abstraction has 6136 states and 27015 transitions. [2022-01-18 15:54:24,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:24,693 INFO L276 IsEmpty]: Start isEmpty. Operand 6136 states and 27015 transitions. [2022-01-18 15:54:24,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:54:24,704 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:24,704 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:24,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Forceful destruction successful, exit code 0 [2022-01-18 15:54:24,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2022-01-18 15:54:24,905 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:54:24,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:24,905 INFO L85 PathProgramCache]: Analyzing trace with hash -863300186, now seen corresponding path program 191 times [2022-01-18 15:54:24,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:24,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092393728] [2022-01-18 15:54:24,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:24,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:24,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:25,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:25,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:25,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092393728] [2022-01-18 15:54:25,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092393728] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:25,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943081080] [2022-01-18 15:54:25,066 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:54:25,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:25,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:25,067 INFO L229 MonitoredProcess]: Starting monitored process 307 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:25,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2022-01-18 15:54:25,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:54:25,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:25,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:54:25,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:25,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:25,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:54:25,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:25,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:25,813 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:25,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:54:25,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:25,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:54:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:25,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943081080] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:25,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:25,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:54:25,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766654483] [2022-01-18 15:54:25,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:25,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:54:25,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:25,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:54:25,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:54:25,869 INFO L87 Difference]: Start difference. First operand 6136 states and 27015 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:27,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:27,630 INFO L93 Difference]: Finished difference Result 7799 states and 33579 transitions. [2022-01-18 15:54:27,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 15:54:27,630 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:54:27,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:27,699 INFO L225 Difference]: With dead ends: 7799 [2022-01-18 15:54:27,699 INFO L226 Difference]: Without dead ends: 7755 [2022-01-18 15:54:27,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=352, Invalid=2300, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 15:54:27,699 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 325 mSDsluCounter, 1068 mSDsCounter, 0 mSdLazyCounter, 1644 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 1895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:27,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 697 Invalid, 1895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1644 Invalid, 0 Unknown, 112 Unchecked, 0.8s Time] [2022-01-18 15:54:27,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7755 states. [2022-01-18 15:54:27,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7755 to 6168. [2022-01-18 15:54:27,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6168 states, 6167 states have (on average 4.403761958813037) internal successors, (27158), 6167 states have internal predecessors, (27158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:27,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6168 states to 6168 states and 27158 transitions. [2022-01-18 15:54:27,816 INFO L78 Accepts]: Start accepts. Automaton has 6168 states and 27158 transitions. Word has length 23 [2022-01-18 15:54:27,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:27,817 INFO L470 AbstractCegarLoop]: Abstraction has 6168 states and 27158 transitions. [2022-01-18 15:54:27,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:27,817 INFO L276 IsEmpty]: Start isEmpty. Operand 6168 states and 27158 transitions. [2022-01-18 15:54:27,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:54:27,829 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:27,829 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:27,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Forceful destruction successful, exit code 0 [2022-01-18 15:54:28,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,307 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:28,030 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:54:28,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:28,030 INFO L85 PathProgramCache]: Analyzing trace with hash -582304334, now seen corresponding path program 192 times [2022-01-18 15:54:28,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:28,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119091272] [2022-01-18 15:54:28,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:28,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:28,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:28,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:28,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:28,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119091272] [2022-01-18 15:54:28,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119091272] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:28,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148105394] [2022-01-18 15:54:28,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:54:28,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:28,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:28,176 INFO L229 MonitoredProcess]: Starting monitored process 308 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:28,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process [2022-01-18 15:54:28,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:54:28,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:28,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:54:28,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:28,344 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 15:54:28,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 70 [2022-01-18 15:54:28,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:28,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:28,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:28,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148105394] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:28,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:28,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-18 15:54:28,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805397629] [2022-01-18 15:54:28,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:28,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:54:28,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:28,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:54:28,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:54:28,753 INFO L87 Difference]: Start difference. First operand 6168 states and 27158 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:30,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:30,976 INFO L93 Difference]: Finished difference Result 8096 states and 34651 transitions. [2022-01-18 15:54:30,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 15:54:30,976 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:54:30,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:30,996 INFO L225 Difference]: With dead ends: 8096 [2022-01-18 15:54:30,997 INFO L226 Difference]: Without dead ends: 8022 [2022-01-18 15:54:30,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=613, Invalid=3677, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 15:54:30,997 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 481 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 2112 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 2296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 2112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:30,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 723 Invalid, 2296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 2112 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 15:54:31,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8022 states. [2022-01-18 15:54:31,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8022 to 6212. [2022-01-18 15:54:31,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6212 states, 6211 states have (on average 4.409756882949606) internal successors, (27389), 6211 states have internal predecessors, (27389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:31,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6212 states to 6212 states and 27389 transitions. [2022-01-18 15:54:31,115 INFO L78 Accepts]: Start accepts. Automaton has 6212 states and 27389 transitions. Word has length 23 [2022-01-18 15:54:31,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:31,115 INFO L470 AbstractCegarLoop]: Abstraction has 6212 states and 27389 transitions. [2022-01-18 15:54:31,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:31,115 INFO L276 IsEmpty]: Start isEmpty. Operand 6212 states and 27389 transitions. [2022-01-18 15:54:31,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:54:31,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:31,126 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:31,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Ended with exit code 0 [2022-01-18 15:54:31,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable307 [2022-01-18 15:54:31,327 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:54:31,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:31,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1911001754, now seen corresponding path program 193 times [2022-01-18 15:54:31,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:31,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528956779] [2022-01-18 15:54:31,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:31,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:31,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:31,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:31,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:31,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528956779] [2022-01-18 15:54:31,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528956779] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:31,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416786148] [2022-01-18 15:54:31,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:54:31,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:31,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:31,479 INFO L229 MonitoredProcess]: Starting monitored process 309 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:31,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Waiting until timeout for monitored process [2022-01-18 15:54:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:31,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:54:31,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:31,622 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:31,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:54:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:32,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:32,186 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:32,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:54:32,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:32,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:54:32,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:32,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416786148] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:32,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:32,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:54:32,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064949429] [2022-01-18 15:54:32,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:32,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:54:32,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:32,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:54:32,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:54:32,249 INFO L87 Difference]: Start difference. First operand 6212 states and 27389 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:33,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:33,491 INFO L93 Difference]: Finished difference Result 6813 states and 29704 transitions. [2022-01-18 15:54:33,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 15:54:33,491 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:54:33,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:33,510 INFO L225 Difference]: With dead ends: 6813 [2022-01-18 15:54:33,510 INFO L226 Difference]: Without dead ends: 6787 [2022-01-18 15:54:33,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=279, Invalid=1443, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:54:33,510 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 310 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 1540 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 1744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:33,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 582 Invalid, 1744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1540 Invalid, 0 Unknown, 48 Unchecked, 0.7s Time] [2022-01-18 15:54:33,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6787 states. [2022-01-18 15:54:33,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6787 to 6214. [2022-01-18 15:54:33,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6214 states, 6213 states have (on average 4.409624979880895) internal successors, (27397), 6213 states have internal predecessors, (27397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:33,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6214 states to 6214 states and 27397 transitions. [2022-01-18 15:54:33,631 INFO L78 Accepts]: Start accepts. Automaton has 6214 states and 27397 transitions. Word has length 23 [2022-01-18 15:54:33,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:33,631 INFO L470 AbstractCegarLoop]: Abstraction has 6214 states and 27397 transitions. [2022-01-18 15:54:33,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:33,631 INFO L276 IsEmpty]: Start isEmpty. Operand 6214 states and 27397 transitions. [2022-01-18 15:54:33,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:54:33,643 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:33,643 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:33,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Ended with exit code 0 [2022-01-18 15:54:33,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,309 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:33,843 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:54:33,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:33,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1890748156, now seen corresponding path program 194 times [2022-01-18 15:54:33,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:33,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093666212] [2022-01-18 15:54:33,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:33,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:33,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:33,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:33,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093666212] [2022-01-18 15:54:33,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093666212] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:33,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094065560] [2022-01-18 15:54:33,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:54:33,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:33,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:33,994 INFO L229 MonitoredProcess]: Starting monitored process 310 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:33,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Waiting until timeout for monitored process [2022-01-18 15:54:34,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:54:34,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:34,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:54:34,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:34,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:34,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:54:34,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:34,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:34,781 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:34,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:54:34,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:34,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:54:34,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:34,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094065560] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:34,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:34,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:54:34,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124822737] [2022-01-18 15:54:34,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:34,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:54:34,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:34,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:54:34,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:54:34,837 INFO L87 Difference]: Start difference. First operand 6214 states and 27397 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:36,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:36,163 INFO L93 Difference]: Finished difference Result 6992 states and 30390 transitions. [2022-01-18 15:54:36,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 15:54:36,163 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:54:36,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:36,182 INFO L225 Difference]: With dead ends: 6992 [2022-01-18 15:54:36,183 INFO L226 Difference]: Without dead ends: 6950 [2022-01-18 15:54:36,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=290, Invalid=1690, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 15:54:36,183 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 194 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 1576 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 1789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:36,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 676 Invalid, 1789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1576 Invalid, 0 Unknown, 111 Unchecked, 0.7s Time] [2022-01-18 15:54:36,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6950 states. [2022-01-18 15:54:36,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6950 to 6214. [2022-01-18 15:54:36,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6214 states, 6213 states have (on average 4.409624979880895) internal successors, (27397), 6213 states have internal predecessors, (27397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:36,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6214 states to 6214 states and 27397 transitions. [2022-01-18 15:54:36,296 INFO L78 Accepts]: Start accepts. Automaton has 6214 states and 27397 transitions. Word has length 23 [2022-01-18 15:54:36,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:36,296 INFO L470 AbstractCegarLoop]: Abstraction has 6214 states and 27397 transitions. [2022-01-18 15:54:36,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:36,296 INFO L276 IsEmpty]: Start isEmpty. Operand 6214 states and 27397 transitions. [2022-01-18 15:54:36,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:54:36,307 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:36,307 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:36,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Ended with exit code 0 [2022-01-18 15:54:36,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,310 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:36,508 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:54:36,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:36,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1469442884, now seen corresponding path program 195 times [2022-01-18 15:54:36,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:36,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660578801] [2022-01-18 15:54:36,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:36,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:36,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:36,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:36,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:36,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660578801] [2022-01-18 15:54:36,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660578801] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:36,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375674671] [2022-01-18 15:54:36,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:54:36,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:36,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:36,655 INFO L229 MonitoredProcess]: Starting monitored process 311 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:36,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Waiting until timeout for monitored process [2022-01-18 15:54:36,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:54:36,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:36,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:54:36,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:36,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:36,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:54:37,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:37,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:37,452 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:37,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:54:37,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:37,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:54:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:37,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375674671] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:37,505 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:37,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:54:37,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588470446] [2022-01-18 15:54:37,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:37,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:54:37,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:37,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:54:37,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:54:37,506 INFO L87 Difference]: Start difference. First operand 6214 states and 27397 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:38,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:38,535 INFO L93 Difference]: Finished difference Result 7032 states and 30546 transitions. [2022-01-18 15:54:38,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:54:38,535 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:54:38,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:38,553 INFO L225 Difference]: With dead ends: 7032 [2022-01-18 15:54:38,553 INFO L226 Difference]: Without dead ends: 6982 [2022-01-18 15:54:38,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=236, Invalid=1246, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:54:38,553 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 256 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 1254 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 1434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:38,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 486 Invalid, 1434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1254 Invalid, 0 Unknown, 66 Unchecked, 0.5s Time] [2022-01-18 15:54:38,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6982 states. [2022-01-18 15:54:38,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6982 to 6220. [2022-01-18 15:54:38,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6220 states, 6219 states have (on average 4.409229779707348) internal successors, (27421), 6219 states have internal predecessors, (27421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:38,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6220 states to 6220 states and 27421 transitions. [2022-01-18 15:54:38,665 INFO L78 Accepts]: Start accepts. Automaton has 6220 states and 27421 transitions. Word has length 23 [2022-01-18 15:54:38,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:38,665 INFO L470 AbstractCegarLoop]: Abstraction has 6220 states and 27421 transitions. [2022-01-18 15:54:38,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:38,665 INFO L276 IsEmpty]: Start isEmpty. Operand 6220 states and 27421 transitions. [2022-01-18 15:54:38,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:54:38,676 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:38,677 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:38,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Forceful destruction successful, exit code 0 [2022-01-18 15:54:38,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 311 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2022-01-18 15:54:38,877 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:54:38,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:38,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1812831880, now seen corresponding path program 196 times [2022-01-18 15:54:38,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:38,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181284195] [2022-01-18 15:54:38,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:38,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:38,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:39,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:39,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:39,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181284195] [2022-01-18 15:54:39,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181284195] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:39,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896071234] [2022-01-18 15:54:39,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:54:39,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:39,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:39,022 INFO L229 MonitoredProcess]: Starting monitored process 312 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:39,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Waiting until timeout for monitored process [2022-01-18 15:54:39,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:54:39,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:39,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:54:39,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:39,170 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:39,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:54:39,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:39,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:39,820 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:39,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:54:39,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:39,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:54:39,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:39,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896071234] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:39,872 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:39,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:54:39,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800350322] [2022-01-18 15:54:39,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:39,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:54:39,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:39,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:54:39,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:54:39,873 INFO L87 Difference]: Start difference. First operand 6220 states and 27421 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:41,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:41,002 INFO L93 Difference]: Finished difference Result 6923 states and 30119 transitions. [2022-01-18 15:54:41,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:54:41,002 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:54:41,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:41,019 INFO L225 Difference]: With dead ends: 6923 [2022-01-18 15:54:41,020 INFO L226 Difference]: Without dead ends: 6881 [2022-01-18 15:54:41,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:54:41,020 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 254 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 1124 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:41,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 508 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1124 Invalid, 0 Unknown, 288 Unchecked, 0.5s Time] [2022-01-18 15:54:41,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6881 states. [2022-01-18 15:54:41,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6881 to 6216. [2022-01-18 15:54:41,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6216 states, 6215 states have (on average 4.4094931617055515) internal successors, (27405), 6215 states have internal predecessors, (27405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:41,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6216 states to 6216 states and 27405 transitions. [2022-01-18 15:54:41,133 INFO L78 Accepts]: Start accepts. Automaton has 6216 states and 27405 transitions. Word has length 23 [2022-01-18 15:54:41,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:41,133 INFO L470 AbstractCegarLoop]: Abstraction has 6216 states and 27405 transitions. [2022-01-18 15:54:41,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:41,134 INFO L276 IsEmpty]: Start isEmpty. Operand 6216 states and 27405 transitions. [2022-01-18 15:54:41,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:54:41,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:41,146 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:41,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Ended with exit code 0 [2022-01-18 15:54:41,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2022-01-18 15:54:41,346 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:54:41,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:41,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1333269296, now seen corresponding path program 197 times [2022-01-18 15:54:41,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:41,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339366476] [2022-01-18 15:54:41,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:41,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:41,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:41,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:41,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:41,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339366476] [2022-01-18 15:54:41,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339366476] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:41,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129890884] [2022-01-18 15:54:41,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:54:41,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:41,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:41,486 INFO L229 MonitoredProcess]: Starting monitored process 313 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:41,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Waiting until timeout for monitored process [2022-01-18 15:54:41,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:54:41,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:41,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:54:41,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:41,700 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:41,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 52 [2022-01-18 15:54:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:41,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:41,946 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:41,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:54:41,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:41,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:54:42,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:42,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129890884] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:42,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:42,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:54:42,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576623721] [2022-01-18 15:54:42,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:42,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:54:42,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:42,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:54:42,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:54:42,002 INFO L87 Difference]: Start difference. First operand 6216 states and 27405 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:43,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:43,855 INFO L93 Difference]: Finished difference Result 7923 states and 33992 transitions. [2022-01-18 15:54:43,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 15:54:43,855 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:54:43,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:43,875 INFO L225 Difference]: With dead ends: 7923 [2022-01-18 15:54:43,875 INFO L226 Difference]: Without dead ends: 7882 [2022-01-18 15:54:43,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=348, Invalid=2304, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 15:54:43,876 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 308 mSDsluCounter, 1369 mSDsCounter, 0 mSdLazyCounter, 2085 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 2256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 2085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:43,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 798 Invalid, 2256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 2085 Invalid, 0 Unknown, 29 Unchecked, 0.9s Time] [2022-01-18 15:54:43,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7882 states. [2022-01-18 15:54:43,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7882 to 6235. [2022-01-18 15:54:43,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6235 states, 6234 states have (on average 4.4093679820340075) internal successors, (27488), 6234 states have internal predecessors, (27488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:43,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6235 states to 6235 states and 27488 transitions. [2022-01-18 15:54:43,999 INFO L78 Accepts]: Start accepts. Automaton has 6235 states and 27488 transitions. Word has length 23 [2022-01-18 15:54:44,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:44,000 INFO L470 AbstractCegarLoop]: Abstraction has 6235 states and 27488 transitions. [2022-01-18 15:54:44,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:44,000 INFO L276 IsEmpty]: Start isEmpty. Operand 6235 states and 27488 transitions. [2022-01-18 15:54:44,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:54:44,011 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:44,011 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:44,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Forceful destruction successful, exit code 0 [2022-01-18 15:54:44,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2022-01-18 15:54:44,212 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:54:44,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:44,212 INFO L85 PathProgramCache]: Analyzing trace with hash 412014740, now seen corresponding path program 198 times [2022-01-18 15:54:44,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:44,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139117270] [2022-01-18 15:54:44,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:44,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:44,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:44,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:44,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:44,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139117270] [2022-01-18 15:54:44,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139117270] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:44,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351199685] [2022-01-18 15:54:44,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:54:44,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:44,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:44,349 INFO L229 MonitoredProcess]: Starting monitored process 314 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:44,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Waiting until timeout for monitored process [2022-01-18 15:54:44,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:54:44,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:44,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:54:44,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:44,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:44,539 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-01-18 15:54:44,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 55 [2022-01-18 15:54:44,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:44,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:44,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:44,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351199685] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:44,901 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:44,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-18 15:54:44,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201182761] [2022-01-18 15:54:44,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:44,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:54:44,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:44,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:54:44,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:54:44,902 INFO L87 Difference]: Start difference. First operand 6235 states and 27488 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:47,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:47,139 INFO L93 Difference]: Finished difference Result 9166 states and 39013 transitions. [2022-01-18 15:54:47,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 15:54:47,139 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:54:47,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:47,162 INFO L225 Difference]: With dead ends: 9166 [2022-01-18 15:54:47,162 INFO L226 Difference]: Without dead ends: 9073 [2022-01-18 15:54:47,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=560, Invalid=3222, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 15:54:47,163 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 666 mSDsluCounter, 1353 mSDsCounter, 0 mSdLazyCounter, 1918 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 2158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 1918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:47,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [666 Valid, 728 Invalid, 2158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 1918 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 15:54:47,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9073 states. [2022-01-18 15:54:47,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9073 to 6266. [2022-01-18 15:54:47,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6266 states, 6265 states have (on average 4.406384676775739) internal successors, (27606), 6265 states have internal predecessors, (27606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:47,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6266 states to 6266 states and 27606 transitions. [2022-01-18 15:54:47,329 INFO L78 Accepts]: Start accepts. Automaton has 6266 states and 27606 transitions. Word has length 23 [2022-01-18 15:54:47,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:47,329 INFO L470 AbstractCegarLoop]: Abstraction has 6266 states and 27606 transitions. [2022-01-18 15:54:47,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:47,329 INFO L276 IsEmpty]: Start isEmpty. Operand 6266 states and 27606 transitions. [2022-01-18 15:54:47,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:54:47,340 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:47,340 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:47,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Ended with exit code 0 [2022-01-18 15:54:47,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,314 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:47,540 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:54:47,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:47,541 INFO L85 PathProgramCache]: Analyzing trace with hash -377615580, now seen corresponding path program 199 times [2022-01-18 15:54:47,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:47,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869874673] [2022-01-18 15:54:47,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:47,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:47,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:47,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:47,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:47,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869874673] [2022-01-18 15:54:47,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869874673] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:47,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729977993] [2022-01-18 15:54:47,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:54:47,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:47,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:47,686 INFO L229 MonitoredProcess]: Starting monitored process 315 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:47,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Waiting until timeout for monitored process [2022-01-18 15:54:47,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:47,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:54:47,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:47,853 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:47,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:54:48,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:48,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:48,363 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:48,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:54:48,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:48,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:54:48,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:48,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729977993] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:48,416 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:48,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:54:48,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445619350] [2022-01-18 15:54:48,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:48,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:54:48,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:48,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:54:48,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:54:48,417 INFO L87 Difference]: Start difference. First operand 6266 states and 27606 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:50,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:50,565 INFO L93 Difference]: Finished difference Result 7617 states and 32872 transitions. [2022-01-18 15:54:50,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 15:54:50,565 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:54:50,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:50,583 INFO L225 Difference]: With dead ends: 7617 [2022-01-18 15:54:50,583 INFO L226 Difference]: Without dead ends: 7565 [2022-01-18 15:54:50,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=424, Invalid=2437, Unknown=1, NotChecked=0, Total=2862 [2022-01-18 15:54:50,584 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 293 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 2153 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 2380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:50,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 758 Invalid, 2380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2153 Invalid, 0 Unknown, 92 Unchecked, 0.9s Time] [2022-01-18 15:54:50,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7565 states. [2022-01-18 15:54:50,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7565 to 6304. [2022-01-18 15:54:50,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6304 states, 6303 states have (on average 4.406155798825956) internal successors, (27772), 6303 states have internal predecessors, (27772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:50,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6304 states to 6304 states and 27772 transitions. [2022-01-18 15:54:50,699 INFO L78 Accepts]: Start accepts. Automaton has 6304 states and 27772 transitions. Word has length 23 [2022-01-18 15:54:50,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:50,699 INFO L470 AbstractCegarLoop]: Abstraction has 6304 states and 27772 transitions. [2022-01-18 15:54:50,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:50,700 INFO L276 IsEmpty]: Start isEmpty. Operand 6304 states and 27772 transitions. [2022-01-18 15:54:50,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:54:50,711 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:50,711 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:50,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Ended with exit code 0 [2022-01-18 15:54:50,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2022-01-18 15:54:50,911 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:54:50,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:50,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1235951154, now seen corresponding path program 200 times [2022-01-18 15:54:50,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:50,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497928025] [2022-01-18 15:54:50,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:50,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:51,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:51,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:51,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497928025] [2022-01-18 15:54:51,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497928025] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:51,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397579223] [2022-01-18 15:54:51,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:54:51,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:51,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:51,058 INFO L229 MonitoredProcess]: Starting monitored process 316 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:51,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Waiting until timeout for monitored process [2022-01-18 15:54:51,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:54:51,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:51,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:54:51,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:51,227 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:51,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:54:51,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:51,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:51,804 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:51,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:54:51,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:51,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:54:51,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:51,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397579223] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:51,859 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:51,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:54:51,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916270721] [2022-01-18 15:54:51,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:51,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:54:51,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:51,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:54:51,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:54:51,860 INFO L87 Difference]: Start difference. First operand 6304 states and 27772 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:53,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:53,866 INFO L93 Difference]: Finished difference Result 7679 states and 33199 transitions. [2022-01-18 15:54:53,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 15:54:53,866 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:54:53,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:53,885 INFO L225 Difference]: With dead ends: 7679 [2022-01-18 15:54:53,885 INFO L226 Difference]: Without dead ends: 7658 [2022-01-18 15:54:53,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=486, Invalid=2820, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 15:54:53,886 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 313 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 1856 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 2282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 267 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:53,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 751 Invalid, 2282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1856 Invalid, 0 Unknown, 267 Unchecked, 0.8s Time] [2022-01-18 15:54:53,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7658 states. [2022-01-18 15:54:53,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7658 to 6316. [2022-01-18 15:54:53,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6316 states, 6315 states have (on average 4.4057007125890735) internal successors, (27822), 6315 states have internal predecessors, (27822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:54,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6316 states to 6316 states and 27822 transitions. [2022-01-18 15:54:54,000 INFO L78 Accepts]: Start accepts. Automaton has 6316 states and 27822 transitions. Word has length 23 [2022-01-18 15:54:54,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:54,000 INFO L470 AbstractCegarLoop]: Abstraction has 6316 states and 27822 transitions. [2022-01-18 15:54:54,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:54,000 INFO L276 IsEmpty]: Start isEmpty. Operand 6316 states and 27822 transitions. [2022-01-18 15:54:54,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:54:54,012 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:54,012 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:54,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Forceful destruction successful, exit code 0 [2022-01-18 15:54:54,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2022-01-18 15:54:54,212 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:54:54,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:54,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1327096228, now seen corresponding path program 201 times [2022-01-18 15:54:54,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:54,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973472936] [2022-01-18 15:54:54,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:54,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:54,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:54,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:54,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:54,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973472936] [2022-01-18 15:54:54,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973472936] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:54,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417113483] [2022-01-18 15:54:54,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:54:54,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:54,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:54,359 INFO L229 MonitoredProcess]: Starting monitored process 317 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:54,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Waiting until timeout for monitored process [2022-01-18 15:54:54,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:54:54,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:54,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:54:54,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:54,505 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:54,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:54:56,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:56,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:56,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:56,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:54:56,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:56,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:54:56,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:56,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417113483] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:56,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:56,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:54:56,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099650794] [2022-01-18 15:54:56,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:56,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:54:56,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:56,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:54:56,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:54:56,383 INFO L87 Difference]: Start difference. First operand 6316 states and 27822 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:57,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:54:57,912 INFO L93 Difference]: Finished difference Result 7055 states and 30675 transitions. [2022-01-18 15:54:57,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 15:54:57,912 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:54:57,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:54:57,930 INFO L225 Difference]: With dead ends: 7055 [2022-01-18 15:54:57,930 INFO L226 Difference]: Without dead ends: 7029 [2022-01-18 15:54:57,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=368, Invalid=1702, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 15:54:57,931 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 403 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:54:57,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 493 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1336 Invalid, 0 Unknown, 148 Unchecked, 0.6s Time] [2022-01-18 15:54:57,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7029 states. [2022-01-18 15:54:58,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7029 to 6332. [2022-01-18 15:54:58,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6332 states, 6331 states have (on average 4.40388564207866) internal successors, (27881), 6331 states have internal predecessors, (27881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:58,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6332 states to 6332 states and 27881 transitions. [2022-01-18 15:54:58,045 INFO L78 Accepts]: Start accepts. Automaton has 6332 states and 27881 transitions. Word has length 23 [2022-01-18 15:54:58,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:54:58,045 INFO L470 AbstractCegarLoop]: Abstraction has 6332 states and 27881 transitions. [2022-01-18 15:54:58,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:54:58,045 INFO L276 IsEmpty]: Start isEmpty. Operand 6332 states and 27881 transitions. [2022-01-18 15:54:58,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:54:58,057 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:54:58,057 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:54:58,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Forceful destruction successful, exit code 0 [2022-01-18 15:54:58,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316,317 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:58,266 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:54:58,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:54:58,266 INFO L85 PathProgramCache]: Analyzing trace with hash 285520160, now seen corresponding path program 202 times [2022-01-18 15:54:58,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:54:58,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114643370] [2022-01-18 15:54:58,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:54:58,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:54:58,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:54:58,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:58,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:54:58,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114643370] [2022-01-18 15:54:58,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114643370] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:54:58,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629663157] [2022-01-18 15:54:58,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:54:58,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:54:58,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:54:58,444 INFO L229 MonitoredProcess]: Starting monitored process 318 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:54:58,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Waiting until timeout for monitored process [2022-01-18 15:54:58,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:54:58,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:54:58,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:54:58,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:54:58,588 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:58,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:54:59,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:59,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:54:59,249 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:54:59,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:54:59,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:54:59,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:54:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:54:59,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629663157] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:54:59,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:54:59,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:54:59,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590153342] [2022-01-18 15:54:59,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:54:59,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:54:59,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:54:59,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:54:59,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:54:59,304 INFO L87 Difference]: Start difference. First operand 6332 states and 27881 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:00,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:00,698 INFO L93 Difference]: Finished difference Result 7074 states and 30761 transitions. [2022-01-18 15:55:00,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:55:00,698 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:55:00,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:00,716 INFO L225 Difference]: With dead ends: 7074 [2022-01-18 15:55:00,716 INFO L226 Difference]: Without dead ends: 7046 [2022-01-18 15:55:00,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:55:00,716 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 252 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 1612 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 1849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:00,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 570 Invalid, 1849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1612 Invalid, 0 Unknown, 140 Unchecked, 0.7s Time] [2022-01-18 15:55:00,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7046 states. [2022-01-18 15:55:00,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7046 to 6324. [2022-01-18 15:55:00,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6324 states, 6323 states have (on average 4.405820022141389) internal successors, (27858), 6323 states have internal predecessors, (27858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:00,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6324 states to 6324 states and 27858 transitions. [2022-01-18 15:55:00,829 INFO L78 Accepts]: Start accepts. Automaton has 6324 states and 27858 transitions. Word has length 23 [2022-01-18 15:55:00,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:00,829 INFO L470 AbstractCegarLoop]: Abstraction has 6324 states and 27858 transitions. [2022-01-18 15:55:00,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:00,830 INFO L276 IsEmpty]: Start isEmpty. Operand 6324 states and 27858 transitions. [2022-01-18 15:55:00,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:55:00,841 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:00,841 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:00,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Ended with exit code 0 [2022-01-18 15:55:01,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,318 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:01,042 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:55:01,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:01,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1601192, now seen corresponding path program 203 times [2022-01-18 15:55:01,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:01,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024599224] [2022-01-18 15:55:01,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:01,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:01,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:01,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:01,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:01,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024599224] [2022-01-18 15:55:01,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024599224] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:01,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083833321] [2022-01-18 15:55:01,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:55:01,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:01,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:01,199 INFO L229 MonitoredProcess]: Starting monitored process 319 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:01,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Waiting until timeout for monitored process [2022-01-18 15:55:01,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:55:01,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:01,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:55:01,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:01,336 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:55:01,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2022-01-18 15:55:01,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:01,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:01,658 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:55:01,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:55:01,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:01,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:55:01,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:01,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083833321] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:01,715 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:01,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:55:01,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396168186] [2022-01-18 15:55:01,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:01,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:55:01,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:01,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:55:01,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:55:01,716 INFO L87 Difference]: Start difference. First operand 6324 states and 27858 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:03,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:03,003 INFO L93 Difference]: Finished difference Result 6905 states and 30089 transitions. [2022-01-18 15:55:03,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 15:55:03,004 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:55:03,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:03,022 INFO L225 Difference]: With dead ends: 6905 [2022-01-18 15:55:03,023 INFO L226 Difference]: Without dead ends: 6879 [2022-01-18 15:55:03,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=299, Invalid=1681, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 15:55:03,023 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 263 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 1427 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 1574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:03,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 509 Invalid, 1574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1427 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 15:55:03,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6879 states. [2022-01-18 15:55:03,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6879 to 6330. [2022-01-18 15:55:03,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6330 states, 6329 states have (on average 4.405119292147258) internal successors, (27880), 6329 states have internal predecessors, (27880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:03,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6330 states to 6330 states and 27880 transitions. [2022-01-18 15:55:03,193 INFO L78 Accepts]: Start accepts. Automaton has 6330 states and 27880 transitions. Word has length 23 [2022-01-18 15:55:03,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:03,193 INFO L470 AbstractCegarLoop]: Abstraction has 6330 states and 27880 transitions. [2022-01-18 15:55:03,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:03,194 INFO L276 IsEmpty]: Start isEmpty. Operand 6330 states and 27880 transitions. [2022-01-18 15:55:03,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:55:03,206 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:03,206 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:03,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Ended with exit code 0 [2022-01-18 15:55:03,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,319 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:03,406 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:55:03,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:03,407 INFO L85 PathProgramCache]: Analyzing trace with hash -494818578, now seen corresponding path program 204 times [2022-01-18 15:55:03,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:03,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259443710] [2022-01-18 15:55:03,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:03,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:03,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:03,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:03,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:03,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259443710] [2022-01-18 15:55:03,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259443710] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:03,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066326343] [2022-01-18 15:55:03,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:55:03,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:03,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:03,560 INFO L229 MonitoredProcess]: Starting monitored process 320 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:03,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Waiting until timeout for monitored process [2022-01-18 15:55:03,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:55:03,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:03,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:55:03,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:03,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:03,742 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 15:55:03,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 53 [2022-01-18 15:55:03,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:03,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:04,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066326343] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:04,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:04,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-18 15:55:04,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756787883] [2022-01-18 15:55:04,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:04,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 15:55:04,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:04,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 15:55:04,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:55:04,175 INFO L87 Difference]: Start difference. First operand 6330 states and 27880 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:06,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:06,331 INFO L93 Difference]: Finished difference Result 8384 states and 35981 transitions. [2022-01-18 15:55:06,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 15:55:06,331 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:55:06,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:06,352 INFO L225 Difference]: With dead ends: 8384 [2022-01-18 15:55:06,352 INFO L226 Difference]: Without dead ends: 8330 [2022-01-18 15:55:06,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=657, Invalid=3249, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 15:55:06,353 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 566 mSDsluCounter, 1026 mSDsCounter, 0 mSdLazyCounter, 1617 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 1862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 1617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:06,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [566 Valid, 594 Invalid, 1862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 1617 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 15:55:06,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8330 states. [2022-01-18 15:55:06,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8330 to 6388. [2022-01-18 15:55:06,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6388 states, 6387 states have (on average 4.404102082354783) internal successors, (28129), 6387 states have internal predecessors, (28129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:06,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6388 states to 6388 states and 28129 transitions. [2022-01-18 15:55:06,474 INFO L78 Accepts]: Start accepts. Automaton has 6388 states and 28129 transitions. Word has length 23 [2022-01-18 15:55:06,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:06,474 INFO L470 AbstractCegarLoop]: Abstraction has 6388 states and 28129 transitions. [2022-01-18 15:55:06,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:06,474 INFO L276 IsEmpty]: Start isEmpty. Operand 6388 states and 28129 transitions. [2022-01-18 15:55:06,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:55:06,486 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:06,486 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:06,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Ended with exit code 0 [2022-01-18 15:55:06,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable319 [2022-01-18 15:55:06,686 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:55:06,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:06,686 INFO L85 PathProgramCache]: Analyzing trace with hash 439957678, now seen corresponding path program 205 times [2022-01-18 15:55:06,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:06,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157447679] [2022-01-18 15:55:06,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:06,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:06,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:06,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:06,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:06,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157447679] [2022-01-18 15:55:06,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157447679] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:06,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342978058] [2022-01-18 15:55:06,832 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:55:06,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:06,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:06,833 INFO L229 MonitoredProcess]: Starting monitored process 321 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:06,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Waiting until timeout for monitored process [2022-01-18 15:55:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:06,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:55:06,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:06,980 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:55:06,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:55:07,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:07,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:07,622 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:55:07,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:55:07,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:07,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:55:07,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:07,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342978058] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:07,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:07,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:55:07,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660328479] [2022-01-18 15:55:07,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:07,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:55:07,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:07,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:55:07,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:55:07,676 INFO L87 Difference]: Start difference. First operand 6388 states and 28129 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:09,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:09,284 INFO L93 Difference]: Finished difference Result 7324 states and 31726 transitions. [2022-01-18 15:55:09,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 15:55:09,285 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:55:09,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:09,301 INFO L225 Difference]: With dead ends: 7324 [2022-01-18 15:55:09,301 INFO L226 Difference]: Without dead ends: 7274 [2022-01-18 15:55:09,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=360, Invalid=1896, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 15:55:09,302 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 319 mSDsluCounter, 1026 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 1764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:09,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 584 Invalid, 1764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1549 Invalid, 0 Unknown, 67 Unchecked, 0.7s Time] [2022-01-18 15:55:09,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7274 states. [2022-01-18 15:55:09,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7274 to 6394. [2022-01-18 15:55:09,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6394 states, 6393 states have (on average 4.403722821836384) internal successors, (28153), 6393 states have internal predecessors, (28153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:09,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6394 states to 6394 states and 28153 transitions. [2022-01-18 15:55:09,408 INFO L78 Accepts]: Start accepts. Automaton has 6394 states and 28153 transitions. Word has length 23 [2022-01-18 15:55:09,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:09,408 INFO L470 AbstractCegarLoop]: Abstraction has 6394 states and 28153 transitions. [2022-01-18 15:55:09,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:09,408 INFO L276 IsEmpty]: Start isEmpty. Operand 6394 states and 28153 transitions. [2022-01-18 15:55:09,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:55:09,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:09,421 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:09,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Ended with exit code 0 [2022-01-18 15:55:09,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2022-01-18 15:55:09,621 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:55:09,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:09,621 INFO L85 PathProgramCache]: Analyzing trace with hash -572734854, now seen corresponding path program 206 times [2022-01-18 15:55:09,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:09,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098445034] [2022-01-18 15:55:09,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:09,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:09,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:09,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:09,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:09,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098445034] [2022-01-18 15:55:09,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098445034] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:09,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578735665] [2022-01-18 15:55:09,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:55:09,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:09,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:09,768 INFO L229 MonitoredProcess]: Starting monitored process 322 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:09,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Waiting until timeout for monitored process [2022-01-18 15:55:09,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:55:09,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:09,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:55:09,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:09,931 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:55:09,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:55:10,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:10,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:10,557 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:55:10,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:55:10,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:10,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:55:10,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:10,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578735665] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:10,610 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:10,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:55:10,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501536940] [2022-01-18 15:55:10,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:10,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:55:10,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:10,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:55:10,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:55:10,611 INFO L87 Difference]: Start difference. First operand 6394 states and 28153 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:12,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:12,279 INFO L93 Difference]: Finished difference Result 7200 states and 31270 transitions. [2022-01-18 15:55:12,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 15:55:12,280 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:55:12,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:12,297 INFO L225 Difference]: With dead ends: 7200 [2022-01-18 15:55:12,297 INFO L226 Difference]: Without dead ends: 7158 [2022-01-18 15:55:12,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=381, Invalid=2169, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 15:55:12,298 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 302 mSDsluCounter, 1026 mSDsCounter, 0 mSdLazyCounter, 1445 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 1856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 1445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:12,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 618 Invalid, 1856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 1445 Invalid, 0 Unknown, 246 Unchecked, 0.6s Time] [2022-01-18 15:55:12,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7158 states. [2022-01-18 15:55:12,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7158 to 6400. [2022-01-18 15:55:12,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6400 states, 6399 states have (on average 4.403969370214096) internal successors, (28181), 6399 states have internal predecessors, (28181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:12,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6400 states to 6400 states and 28181 transitions. [2022-01-18 15:55:12,415 INFO L78 Accepts]: Start accepts. Automaton has 6400 states and 28181 transitions. Word has length 23 [2022-01-18 15:55:12,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:12,415 INFO L470 AbstractCegarLoop]: Abstraction has 6400 states and 28181 transitions. [2022-01-18 15:55:12,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:12,416 INFO L276 IsEmpty]: Start isEmpty. Operand 6400 states and 28181 transitions. [2022-01-18 15:55:12,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:55:12,428 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:12,428 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:12,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Ended with exit code 0 [2022-01-18 15:55:12,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2022-01-18 15:55:12,628 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:55:12,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:12,629 INFO L85 PathProgramCache]: Analyzing trace with hash -480952808, now seen corresponding path program 207 times [2022-01-18 15:55:12,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:12,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58078352] [2022-01-18 15:55:12,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:12,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:12,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:12,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:12,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:12,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58078352] [2022-01-18 15:55:12,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58078352] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:12,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394843744] [2022-01-18 15:55:12,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:55:12,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:12,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:12,752 INFO L229 MonitoredProcess]: Starting monitored process 323 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:12,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Waiting until timeout for monitored process [2022-01-18 15:55:12,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 15:55:12,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:12,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:55:12,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:12,944 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:55:12,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:55:13,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:13,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:13,433 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:55:13,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:55:13,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:13,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:55:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:13,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394843744] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:13,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:13,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:55:13,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858771966] [2022-01-18 15:55:13,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:13,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:55:13,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:13,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:55:13,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:55:13,489 INFO L87 Difference]: Start difference. First operand 6400 states and 28181 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:14,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:14,215 INFO L93 Difference]: Finished difference Result 6981 states and 30456 transitions. [2022-01-18 15:55:14,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:55:14,215 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:55:14,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:14,232 INFO L225 Difference]: With dead ends: 6981 [2022-01-18 15:55:14,232 INFO L226 Difference]: Without dead ends: 6959 [2022-01-18 15:55:14,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:55:14,232 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 172 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:14,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 496 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1083 Invalid, 0 Unknown, 82 Unchecked, 0.4s Time] [2022-01-18 15:55:14,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6959 states. [2022-01-18 15:55:14,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6959 to 6412. [2022-01-18 15:55:14,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6412 states, 6411 states have (on average 4.405396973951022) internal successors, (28243), 6411 states have internal predecessors, (28243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:14,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6412 states to 6412 states and 28243 transitions. [2022-01-18 15:55:14,342 INFO L78 Accepts]: Start accepts. Automaton has 6412 states and 28243 transitions. Word has length 23 [2022-01-18 15:55:14,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:14,342 INFO L470 AbstractCegarLoop]: Abstraction has 6412 states and 28243 transitions. [2022-01-18 15:55:14,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:14,343 INFO L276 IsEmpty]: Start isEmpty. Operand 6412 states and 28243 transitions. [2022-01-18 15:55:14,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:55:14,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:14,354 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:14,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Ended with exit code 0 [2022-01-18 15:55:14,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable322,323 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:14,555 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:55:14,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:14,555 INFO L85 PathProgramCache]: Analyzing trace with hash 104381144, now seen corresponding path program 208 times [2022-01-18 15:55:14,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:14,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563583646] [2022-01-18 15:55:14,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:14,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:14,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:14,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563583646] [2022-01-18 15:55:14,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563583646] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:14,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864459302] [2022-01-18 15:55:14,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:55:14,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:14,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:14,676 INFO L229 MonitoredProcess]: Starting monitored process 324 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:14,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Waiting until timeout for monitored process [2022-01-18 15:55:14,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:55:14,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:14,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:55:14,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:14,847 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:55:14,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2022-01-18 15:55:15,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:15,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:15,346 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:55:15,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:55:15,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:15,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:55:15,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:15,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864459302] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:15,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:15,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:55:15,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977305519] [2022-01-18 15:55:15,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:15,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:55:15,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:15,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:55:15,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:55:15,400 INFO L87 Difference]: Start difference. First operand 6412 states and 28243 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:16,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:16,301 INFO L93 Difference]: Finished difference Result 6958 states and 30317 transitions. [2022-01-18 15:55:16,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:55:16,301 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:55:16,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:16,318 INFO L225 Difference]: With dead ends: 6958 [2022-01-18 15:55:16,318 INFO L226 Difference]: Without dead ends: 6906 [2022-01-18 15:55:16,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:55:16,319 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 239 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 1430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:16,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 478 Invalid, 1430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1217 Invalid, 0 Unknown, 134 Unchecked, 0.5s Time] [2022-01-18 15:55:16,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6906 states. [2022-01-18 15:55:16,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6906 to 6420. [2022-01-18 15:55:16,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6420 states, 6419 states have (on average 4.405514877706808) internal successors, (28279), 6419 states have internal predecessors, (28279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:16,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6420 states to 6420 states and 28279 transitions. [2022-01-18 15:55:16,430 INFO L78 Accepts]: Start accepts. Automaton has 6420 states and 28279 transitions. Word has length 23 [2022-01-18 15:55:16,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:16,430 INFO L470 AbstractCegarLoop]: Abstraction has 6420 states and 28279 transitions. [2022-01-18 15:55:16,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:16,430 INFO L276 IsEmpty]: Start isEmpty. Operand 6420 states and 28279 transitions. [2022-01-18 15:55:16,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:55:16,442 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:16,442 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:16,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Ended with exit code 0 [2022-01-18 15:55:16,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2022-01-18 15:55:16,642 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:55:16,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:16,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1717947878, now seen corresponding path program 209 times [2022-01-18 15:55:16,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:16,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451043439] [2022-01-18 15:55:16,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:16,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:16,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:16,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:16,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:16,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451043439] [2022-01-18 15:55:16,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451043439] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:16,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346069955] [2022-01-18 15:55:16,772 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:55:16,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:16,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:16,773 INFO L229 MonitoredProcess]: Starting monitored process 325 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:16,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Waiting until timeout for monitored process [2022-01-18 15:55:16,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:55:16,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:16,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:55:16,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:16,945 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:55:16,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:55:17,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:17,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:17,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:55:17,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:55:17,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:17,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:55:17,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:17,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346069955] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:17,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:17,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 15:55:17,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093764690] [2022-01-18 15:55:17,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:17,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:55:17,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:17,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:55:17,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:55:17,591 INFO L87 Difference]: Start difference. First operand 6420 states and 28279 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:18,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:18,525 INFO L93 Difference]: Finished difference Result 6942 states and 30262 transitions. [2022-01-18 15:55:18,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:55:18,525 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:55:18,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:18,542 INFO L225 Difference]: With dead ends: 6942 [2022-01-18 15:55:18,542 INFO L226 Difference]: Without dead ends: 6900 [2022-01-18 15:55:18,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=193, Invalid=1213, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:55:18,543 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 192 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 1219 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 1515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 231 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:18,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 535 Invalid, 1515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1219 Invalid, 0 Unknown, 231 Unchecked, 0.5s Time] [2022-01-18 15:55:18,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6900 states. [2022-01-18 15:55:18,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6900 to 6414. [2022-01-18 15:55:18,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6414 states, 6413 states have (on average 4.405738343988773) internal successors, (28254), 6413 states have internal predecessors, (28254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:18,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6414 states to 6414 states and 28254 transitions. [2022-01-18 15:55:18,654 INFO L78 Accepts]: Start accepts. Automaton has 6414 states and 28254 transitions. Word has length 23 [2022-01-18 15:55:18,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:18,655 INFO L470 AbstractCegarLoop]: Abstraction has 6414 states and 28254 transitions. [2022-01-18 15:55:18,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:18,655 INFO L276 IsEmpty]: Start isEmpty. Operand 6414 states and 28254 transitions. [2022-01-18 15:55:18,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:55:18,667 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:18,667 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:18,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Ended with exit code 0 [2022-01-18 15:55:18,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2022-01-18 15:55:18,867 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:55:18,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:18,867 INFO L85 PathProgramCache]: Analyzing trace with hash -708174188, now seen corresponding path program 210 times [2022-01-18 15:55:18,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:18,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751051678] [2022-01-18 15:55:18,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:18,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:18,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:18,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:18,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:18,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751051678] [2022-01-18 15:55:18,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751051678] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:18,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988968984] [2022-01-18 15:55:18,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:55:18,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:18,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:18,992 INFO L229 MonitoredProcess]: Starting monitored process 326 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:18,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Waiting until timeout for monitored process [2022-01-18 15:55:19,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 15:55:19,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:19,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 15:55:19,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:19,180 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:55:19,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-01-18 15:55:19,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:19,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:19,645 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:55:19,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:55:19,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:19,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:55:19,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:19,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988968984] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:19,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:19,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:55:19,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433905482] [2022-01-18 15:55:19,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:19,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:55:19,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:19,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:55:19,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:55:19,700 INFO L87 Difference]: Start difference. First operand 6414 states and 28254 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:20,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:20,641 INFO L93 Difference]: Finished difference Result 6894 states and 30124 transitions. [2022-01-18 15:55:20,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:55:20,641 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:55:20,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:20,658 INFO L225 Difference]: With dead ends: 6894 [2022-01-18 15:55:20,658 INFO L226 Difference]: Without dead ends: 6872 [2022-01-18 15:55:20,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=187, Invalid=1219, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:55:20,659 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 196 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 1484 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 1647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:20,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 668 Invalid, 1647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1484 Invalid, 0 Unknown, 104 Unchecked, 0.6s Time] [2022-01-18 15:55:20,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6872 states. [2022-01-18 15:55:20,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6872 to 6414. [2022-01-18 15:55:20,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6414 states, 6413 states have (on average 4.405738343988773) internal successors, (28254), 6413 states have internal predecessors, (28254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:20,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6414 states to 6414 states and 28254 transitions. [2022-01-18 15:55:20,770 INFO L78 Accepts]: Start accepts. Automaton has 6414 states and 28254 transitions. Word has length 23 [2022-01-18 15:55:20,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:20,770 INFO L470 AbstractCegarLoop]: Abstraction has 6414 states and 28254 transitions. [2022-01-18 15:55:20,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:20,770 INFO L276 IsEmpty]: Start isEmpty. Operand 6414 states and 28254 transitions. [2022-01-18 15:55:20,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:55:20,781 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:20,781 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:20,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Ended with exit code 0 [2022-01-18 15:55:20,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,326 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:20,982 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:55:20,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:20,982 INFO L85 PathProgramCache]: Analyzing trace with hash -194647336, now seen corresponding path program 211 times [2022-01-18 15:55:20,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:20,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778794047] [2022-01-18 15:55:20,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:20,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:20,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:21,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:21,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778794047] [2022-01-18 15:55:21,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778794047] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:21,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670730793] [2022-01-18 15:55:21,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:55:21,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:21,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:21,116 INFO L229 MonitoredProcess]: Starting monitored process 327 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:21,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Waiting until timeout for monitored process [2022-01-18 15:55:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:21,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:55:21,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:21,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:55:21,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:55:21,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:21,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:21,836 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:55:21,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:55:21,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:21,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:55:21,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:21,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670730793] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:21,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:21,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:55:21,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130404491] [2022-01-18 15:55:21,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:21,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:55:21,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:21,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:55:21,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:55:21,892 INFO L87 Difference]: Start difference. First operand 6414 states and 28254 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:22,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:22,899 INFO L93 Difference]: Finished difference Result 6903 states and 30128 transitions. [2022-01-18 15:55:22,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:55:22,900 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:55:22,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:22,916 INFO L225 Difference]: With dead ends: 6903 [2022-01-18 15:55:22,916 INFO L226 Difference]: Without dead ends: 6878 [2022-01-18 15:55:22,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=232, Invalid=1408, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:55:22,917 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 289 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:22,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 498 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1251 Invalid, 0 Unknown, 75 Unchecked, 0.5s Time] [2022-01-18 15:55:22,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6878 states. [2022-01-18 15:55:23,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6878 to 6422. [2022-01-18 15:55:23,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6422 states, 6421 states have (on average 4.405544307740227) internal successors, (28288), 6421 states have internal predecessors, (28288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:23,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6422 states to 6422 states and 28288 transitions. [2022-01-18 15:55:23,026 INFO L78 Accepts]: Start accepts. Automaton has 6422 states and 28288 transitions. Word has length 23 [2022-01-18 15:55:23,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:23,026 INFO L470 AbstractCegarLoop]: Abstraction has 6422 states and 28288 transitions. [2022-01-18 15:55:23,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:23,026 INFO L276 IsEmpty]: Start isEmpty. Operand 6422 states and 28288 transitions. [2022-01-18 15:55:23,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:55:23,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:23,038 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:23,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Forceful destruction successful, exit code 0 [2022-01-18 15:55:23,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,327 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:23,238 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:55:23,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:23,238 INFO L85 PathProgramCache]: Analyzing trace with hash 881063820, now seen corresponding path program 212 times [2022-01-18 15:55:23,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:23,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528127154] [2022-01-18 15:55:23,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:23,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:23,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:23,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:23,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:23,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528127154] [2022-01-18 15:55:23,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528127154] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:23,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645265185] [2022-01-18 15:55:23,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:55:23,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:23,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:23,366 INFO L229 MonitoredProcess]: Starting monitored process 328 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:23,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Waiting until timeout for monitored process [2022-01-18 15:55:23,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:55:23,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:23,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:55:23,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:23,529 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:55:23,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:55:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:23,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:24,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:55:24,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:55:24,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:24,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:55:24,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:24,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645265185] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:24,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:24,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 15:55:24,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925787595] [2022-01-18 15:55:24,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:24,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:55:24,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:24,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:55:24,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:55:24,141 INFO L87 Difference]: Start difference. First operand 6422 states and 28288 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:25,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:25,133 INFO L93 Difference]: Finished difference Result 6936 states and 30256 transitions. [2022-01-18 15:55:25,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:55:25,133 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:55:25,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:25,150 INFO L225 Difference]: With dead ends: 6936 [2022-01-18 15:55:25,150 INFO L226 Difference]: Without dead ends: 6915 [2022-01-18 15:55:25,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=254, Invalid=1468, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:55:25,150 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 283 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:25,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 424 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1015 Invalid, 0 Unknown, 109 Unchecked, 0.4s Time] [2022-01-18 15:55:25,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6915 states. [2022-01-18 15:55:25,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6915 to 6414. [2022-01-18 15:55:25,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6414 states, 6413 states have (on average 4.405738343988773) internal successors, (28254), 6413 states have internal predecessors, (28254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:25,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6414 states to 6414 states and 28254 transitions. [2022-01-18 15:55:25,260 INFO L78 Accepts]: Start accepts. Automaton has 6414 states and 28254 transitions. Word has length 23 [2022-01-18 15:55:25,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:25,260 INFO L470 AbstractCegarLoop]: Abstraction has 6414 states and 28254 transitions. [2022-01-18 15:55:25,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:25,260 INFO L276 IsEmpty]: Start isEmpty. Operand 6414 states and 28254 transitions. [2022-01-18 15:55:25,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:55:25,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:25,272 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:25,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Forceful destruction successful, exit code 0 [2022-01-18 15:55:25,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 328 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2022-01-18 15:55:25,472 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:55:25,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:25,473 INFO L85 PathProgramCache]: Analyzing trace with hash -166637748, now seen corresponding path program 213 times [2022-01-18 15:55:25,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:25,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690954289] [2022-01-18 15:55:25,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:25,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:25,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:25,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:25,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690954289] [2022-01-18 15:55:25,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690954289] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:25,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377063334] [2022-01-18 15:55:25,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:55:25,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:25,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:25,626 INFO L229 MonitoredProcess]: Starting monitored process 329 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:25,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Waiting until timeout for monitored process [2022-01-18 15:55:25,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:55:25,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:25,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:55:25,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:25,778 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:55:25,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:55:26,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:26,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:26,350 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:55:26,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:55:26,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:26,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:55:26,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:26,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377063334] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:26,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:26,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:55:26,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529833511] [2022-01-18 15:55:26,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:26,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:55:26,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:26,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:55:26,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:55:26,407 INFO L87 Difference]: Start difference. First operand 6414 states and 28254 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:27,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:55:27,255 INFO L93 Difference]: Finished difference Result 6936 states and 30236 transitions. [2022-01-18 15:55:27,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:55:27,255 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 15:55:27,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:55:27,271 INFO L225 Difference]: With dead ends: 6936 [2022-01-18 15:55:27,272 INFO L226 Difference]: Without dead ends: 6884 [2022-01-18 15:55:27,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:55:27,272 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 257 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:27,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 362 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 969 Invalid, 0 Unknown, 60 Unchecked, 0.4s Time] [2022-01-18 15:55:27,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6884 states. [2022-01-18 15:55:27,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6884 to 6418. [2022-01-18 15:55:27,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6418 states, 6417 states have (on average 4.405485429328347) internal successors, (28270), 6417 states have internal predecessors, (28270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:27,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6418 states to 6418 states and 28270 transitions. [2022-01-18 15:55:27,383 INFO L78 Accepts]: Start accepts. Automaton has 6418 states and 28270 transitions. Word has length 23 [2022-01-18 15:55:27,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:55:27,383 INFO L470 AbstractCegarLoop]: Abstraction has 6418 states and 28270 transitions. [2022-01-18 15:55:27,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:55:27,383 INFO L276 IsEmpty]: Start isEmpty. Operand 6418 states and 28270 transitions. [2022-01-18 15:55:27,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 15:55:27,395 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:55:27,395 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:55:27,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Ended with exit code 0 [2022-01-18 15:55:27,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,329 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:27,595 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 15:55:27,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:55:27,595 INFO L85 PathProgramCache]: Analyzing trace with hash -659855134, now seen corresponding path program 214 times [2022-01-18 15:55:27,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:55:27,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927465840] [2022-01-18 15:55:27,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:55:27,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:55:27,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:55:27,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:27,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:55:27,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927465840] [2022-01-18 15:55:27,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927465840] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:55:27,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994663956] [2022-01-18 15:55:27,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:55:27,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:27,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:55:27,738 INFO L229 MonitoredProcess]: Starting monitored process 330 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:55:27,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Waiting until timeout for monitored process [2022-01-18 15:55:27,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:55:27,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:55:27,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 15:55:27,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:55:27,885 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:55:27,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-18 15:55:28,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:28,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:55:28,482 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:55:28,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2022-01-18 15:55:28,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:55:28,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 3 [2022-01-18 15:55:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:55:28,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994663956] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:55:28,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:55:28,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 15:55:28,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254210221] [2022-01-18 15:55:28,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:55:28,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:55:28,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:55:28,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:55:28,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:55:28,537 INFO L87 Difference]: Start difference. First operand 6418 states and 28270 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-01-18 15:55:29,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:55:29,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=279, Invalid=1527, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 15:55:29,774 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 196 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:55:29,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 419 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 916 Invalid, 0 Unknown, 196 Unchecked, 0.4s Time] [2022-01-18 15:55:29,775 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (4 of 5 remaining) [2022-01-18 15:55:29,776 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 15:55:29,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Forceful destruction successful, exit code 0 [2022-01-18 15:55:29,791 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 15:55:29,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,330 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:55:29,976 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (6418states) and FLOYD_HOARE automaton (currently 28 states, 25 states before enhancement),while ReachableStatesComputation was computing reachable states (2112 states constructed, input type IntersectNwa). [2022-01-18 15:55:29,977 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (3 of 5 remaining) [2022-01-18 15:55:29,977 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (2 of 5 remaining) [2022-01-18 15:55:29,978 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (1 of 5 remaining) [2022-01-18 15:55:29,978 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3INUSE_VIOLATION (0 of 5 remaining) [2022-01-18 15:55:29,980 INFO L732 BasicCegarLoop]: Path program histogram: [214, 52, 49, 6, 6, 1, 1, 1] [2022-01-18 15:55:29,982 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 15:55:29,982 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 15:55:29,983 INFO L202 PluginConnector]: Adding new model parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 03:55:29 BasicIcfg [2022-01-18 15:55:29,983 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 15:55:29,983 INFO L158 Benchmark]: Toolchain (without parser) took 761952.77ms. Allocated memory was 325.1MB in the beginning and 1.2GB in the end (delta: 918.6MB). Free memory was 285.3MB in the beginning and 680.3MB in the end (delta: -395.0MB). Peak memory consumption was 525.5MB. Max. memory is 16.0GB. [2022-01-18 15:55:29,983 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 325.1MB. Free memory is still 286.5MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 15:55:29,983 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.68ms. Allocated memory is still 325.1MB. Free memory was 285.3MB in the beginning and 283.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 15:55:29,984 INFO L158 Benchmark]: Boogie Preprocessor took 14.26ms. Allocated memory is still 325.1MB. Free memory was 283.8MB in the beginning and 282.7MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 15:55:29,984 INFO L158 Benchmark]: RCFGBuilder took 205.34ms. Allocated memory is still 325.1MB. Free memory was 282.7MB in the beginning and 272.7MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2022-01-18 15:55:29,984 INFO L158 Benchmark]: TraceAbstraction took 761698.86ms. Allocated memory was 325.1MB in the beginning and 1.2GB in the end (delta: 918.6MB). Free memory was 272.1MB in the beginning and 680.3MB in the end (delta: -408.2MB). Peak memory consumption was 512.9MB. Max. memory is 16.0GB. [2022-01-18 15:55:29,984 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12ms. Allocated memory is still 325.1MB. Free memory is still 286.5MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 26.68ms. Allocated memory is still 325.1MB. Free memory was 285.3MB in the beginning and 283.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 14.26ms. Allocated memory is still 325.1MB. Free memory was 283.8MB in the beginning and 282.7MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 205.34ms. Allocated memory is still 325.1MB. Free memory was 282.7MB in the beginning and 272.7MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 761698.86ms. Allocated memory was 325.1MB in the beginning and 1.2GB in the end (delta: 918.6MB). Free memory was 272.1MB in the beginning and 680.3MB in the end (delta: -408.2MB). Peak memory consumption was 512.9MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (6418states) and FLOYD_HOARE automaton (currently 28 states, 25 states before enhancement),while ReachableStatesComputation was computing reachable states (2112 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (6418states) and FLOYD_HOARE automaton (currently 28 states, 25 states before enhancement),while ReachableStatesComputation was computing reachable states (2112 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (6418states) and FLOYD_HOARE automaton (currently 28 states, 25 states before enhancement),while ReachableStatesComputation was computing reachable states (2112 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (6418states) and FLOYD_HOARE automaton (currently 28 states, 25 states before enhancement),while ReachableStatesComputation was computing reachable states (2112 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 77]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (6418states) and FLOYD_HOARE automaton (currently 28 states, 25 states before enhancement),while ReachableStatesComputation was computing reachable states (2112 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 42 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 761.6s, OverallIterations: 330, TraceHistogramMax: 3, PathProgramHistogramMax: 214, EmptinessCheckTime: 2.5s, AutomataDifference: 361.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 71039 SdHoareTripleChecker+Valid, 170.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 71039 mSDsluCounter, 164711 SdHoareTripleChecker+Invalid, 141.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 39835 IncrementalHoareTripleChecker+Unchecked, 259818 mSDsCounter, 28294 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 399868 IncrementalHoareTripleChecker+Invalid, 467997 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 28294 mSolverCounterUnsat, 12712 mSDtfsCounter, 399868 mSolverCounterSat, 1.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 23003 GetRequests, 9489 SyntacticMatches, 1084 SemanticMatches, 12430 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 128754 ImplicationChecksByTransitivity, 290.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6422occurred in iteration=327, InterpolantAutomatonStates: 9737, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 25.3s AutomataMinimizationTime, 329 MinimizatonAttempts, 200997 StatesRemovedByMinimization, 329 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.1s SsaConstructionTime, 3.1s SatisfiabilityAnalysisTime, 294.7s InterpolantComputationTime, 14921 NumberOfCodeBlocks, 14921 NumberOfCodeBlocksAsserted, 1056 NumberOfCheckSat, 21334 ConstructedInterpolants, 1878 QuantifiedInterpolants, 383441 SizeOfPredicates, 2654 NumberOfNonLiveVariables, 28553 ConjunctsInSsa, 9841 ConjunctsInUnsatCore, 985 InterpolantComputations, 4 PerfectInterpolantSequences, 58/6110 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown