/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/bench/exp2x4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 14:49:26,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 14:49:26,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 14:49:26,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 14:49:26,827 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 14:49:26,848 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 14:49:26,849 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 14:49:26,849 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 14:49:26,849 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 14:49:26,850 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 14:49:26,850 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 14:49:26,850 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 14:49:26,850 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 14:49:26,850 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 14:49:26,850 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 14:49:26,851 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 14:49:26,851 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 14:49:26,851 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 14:49:26,851 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 14:49:26,851 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 14:49:26,851 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 14:49:26,851 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 14:49:26,851 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 14:49:26,851 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 14:49:26,851 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 14:49:26,852 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 14:49:26,852 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 14:49:26,852 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 14:49:26,852 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 14:49:26,852 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 14:49:26,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 14:49:26,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 14:49:26,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 14:49:26,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 14:49:26,852 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 14:49:26,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 14:49:26,852 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 14:49:26,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 14:49:26,853 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 14:49:26,853 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 14:49:27,025 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 14:49:27,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 14:49:27,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 14:49:27,039 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 14:49:27,041 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 14:49:27,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x4.wvr.bpl [2022-01-18 14:49:27,042 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x4.wvr.bpl' [2022-01-18 14:49:27,057 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 14:49:27,057 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 14:49:27,059 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 14:49:27,059 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 14:49:27,059 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 14:49:27,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:49:27" (1/1) ... [2022-01-18 14:49:27,070 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:49:27" (1/1) ... [2022-01-18 14:49:27,074 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 14:49:27,075 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 14:49:27,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 14:49:27,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 14:49:27,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 14:49:27,080 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:49:27" (1/1) ... [2022-01-18 14:49:27,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:49:27" (1/1) ... [2022-01-18 14:49:27,081 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:49:27" (1/1) ... [2022-01-18 14:49:27,081 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:49:27" (1/1) ... [2022-01-18 14:49:27,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:49:27" (1/1) ... [2022-01-18 14:49:27,084 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:49:27" (1/1) ... [2022-01-18 14:49:27,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:49:27" (1/1) ... [2022-01-18 14:49:27,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 14:49:27,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 14:49:27,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 14:49:27,086 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 14:49:27,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:49:27" (1/1) ... [2022-01-18 14:49:27,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 14:49:27,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:27,105 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 14:49:27,110 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 14:49:27,134 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 14:49:27,134 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 14:49:27,134 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 14:49:27,134 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 14:49:27,134 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 14:49:27,134 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 14:49:27,134 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 14:49:27,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 14:49:27,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 14:49:27,135 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 14:49:27,135 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 14:49:27,135 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 14:49:27,135 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-01-18 14:49:27,135 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-01-18 14:49:27,135 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-01-18 14:49:27,136 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 14:49:27,175 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 14:49:27,176 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 14:49:27,246 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 14:49:27,251 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 14:49:27,251 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 14:49:27,252 INFO L202 PluginConnector]: Adding new model exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 02:49:27 BoogieIcfgContainer [2022-01-18 14:49:27,252 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 14:49:27,253 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 14:49:27,253 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 14:49:27,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 14:49:27,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:49:27" (1/2) ... [2022-01-18 14:49:27,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5de83f2b and model type exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 02:49:27, skipping insertion in model container [2022-01-18 14:49:27,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 02:49:27" (2/2) ... [2022-01-18 14:49:27,271 INFO L111 eAbstractionObserver]: Analyzing ICFG exp2x4.wvr.bpl [2022-01-18 14:49:27,274 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 14:49:27,274 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 14:49:27,274 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 14:49:27,274 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 14:49:27,329 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-01-18 14:49:27,393 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 14:49:27,397 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 14:49:27,397 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-01-18 14:49:27,406 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 37 transitions, 106 flow [2022-01-18 14:49:27,508 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 940 states, 939 states have (on average 3.913738019169329) internal successors, (3675), 939 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:27,511 INFO L276 IsEmpty]: Start isEmpty. Operand has 940 states, 939 states have (on average 3.913738019169329) internal successors, (3675), 939 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:27,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 14:49:27,527 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:27,528 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 14:49:27,528 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 14:49:27,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:27,532 INFO L85 PathProgramCache]: Analyzing trace with hash 287084453, now seen corresponding path program 1 times [2022-01-18 14:49:27,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:27,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890014061] [2022-01-18 14:49:27,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:27,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:27,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:27,651 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 14:49:27,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:27,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890014061] [2022-01-18 14:49:27,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890014061] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:49:27,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:49:27,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 14:49:27,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773095861] [2022-01-18 14:49:27,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:49:27,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 14:49:27,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:27,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 14:49:27,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 14:49:27,681 INFO L87 Difference]: Start difference. First operand has 940 states, 939 states have (on average 3.913738019169329) internal successors, (3675), 939 states have internal predecessors, (3675), 0 states have call successors, (0), 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 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:27,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:27,787 INFO L93 Difference]: Finished difference Result 1365 states and 5324 transitions. [2022-01-18 14:49:27,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 14:49:27,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 14:49:27,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:27,812 INFO L225 Difference]: With dead ends: 1365 [2022-01-18 14:49:27,812 INFO L226 Difference]: Without dead ends: 1334 [2022-01-18 14:49:27,814 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 14:49:27,816 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:27,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 16 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:49:27,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2022-01-18 14:49:27,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 1069. [2022-01-18 14:49:27,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 3.903558052434457) internal successors, (4169), 1068 states have internal predecessors, (4169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:27,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 4169 transitions. [2022-01-18 14:49:27,951 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 4169 transitions. Word has length 19 [2022-01-18 14:49:27,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:27,952 INFO L470 AbstractCegarLoop]: Abstraction has 1069 states and 4169 transitions. [2022-01-18 14:49:27,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:27,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 4169 transitions. [2022-01-18 14:49:27,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 14:49:27,956 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:27,957 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:27,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 14:49:27,957 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 14:49:27,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:27,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1903967800, now seen corresponding path program 1 times [2022-01-18 14:49:27,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:27,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047803147] [2022-01-18 14:49:27,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:27,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:27,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:28,005 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 14:49:28,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:28,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047803147] [2022-01-18 14:49:28,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047803147] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:49:28,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616141667] [2022-01-18 14:49:28,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:28,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:28,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:28,007 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 14:49:28,008 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 14:49:28,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:28,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 14:49:28,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:49:28,126 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 14:49:28,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:49:28,192 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 14:49:28,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616141667] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:49:28,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:49:28,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-01-18 14:49:28,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49578933] [2022-01-18 14:49:28,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:49:28,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 14:49:28,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:28,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 14:49:28,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:49:28,200 INFO L87 Difference]: Start difference. First operand 1069 states and 4169 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:28,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:28,293 INFO L93 Difference]: Finished difference Result 2313 states and 8847 transitions. [2022-01-18 14:49:28,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 14:49:28,293 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 14:49:28,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:28,306 INFO L225 Difference]: With dead ends: 2313 [2022-01-18 14:49:28,306 INFO L226 Difference]: Without dead ends: 2313 [2022-01-18 14:49:28,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:49:28,308 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 49 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:28,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 46 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:49:28,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2022-01-18 14:49:28,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 1246. [2022-01-18 14:49:28,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.9710843373493976) internal successors, (4944), 1245 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:28,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4944 transitions. [2022-01-18 14:49:28,358 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4944 transitions. Word has length 22 [2022-01-18 14:49:28,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:28,359 INFO L470 AbstractCegarLoop]: Abstraction has 1246 states and 4944 transitions. [2022-01-18 14:49:28,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:28,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4944 transitions. [2022-01-18 14:49:28,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 14:49:28,363 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:28,363 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:28,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 14:49:28,576 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 14:49:28,577 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 14:49:28,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:28,577 INFO L85 PathProgramCache]: Analyzing trace with hash 403848439, now seen corresponding path program 1 times [2022-01-18 14:49:28,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:28,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014634845] [2022-01-18 14:49:28,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:28,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:28,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:28,630 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 14:49:28,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:28,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014634845] [2022-01-18 14:49:28,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014634845] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:49:28,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391503774] [2022-01-18 14:49:28,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:28,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:28,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:28,635 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 14:49:28,638 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 14:49:28,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:28,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 14:49:28,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:49:28,718 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 14:49:28,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:49:28,765 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 14:49:28,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391503774] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:49:28,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:49:28,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-01-18 14:49:28,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33600024] [2022-01-18 14:49:28,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:49:28,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 14:49:28,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:28,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 14:49:28,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 14:49:28,769 INFO L87 Difference]: Start difference. First operand 1246 states and 4944 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:28,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:28,857 INFO L93 Difference]: Finished difference Result 2593 states and 10018 transitions. [2022-01-18 14:49:28,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 14:49:28,857 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 14:49:28,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:28,871 INFO L225 Difference]: With dead ends: 2593 [2022-01-18 14:49:28,871 INFO L226 Difference]: Without dead ends: 2593 [2022-01-18 14:49:28,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:49:28,873 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 95 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:28,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 67 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:49:28,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2593 states. [2022-01-18 14:49:28,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2593 to 1572. [2022-01-18 14:49:28,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1571 states have (on average 4.045830681094844) internal successors, (6356), 1571 states have internal predecessors, (6356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:28,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 6356 transitions. [2022-01-18 14:49:28,927 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 6356 transitions. Word has length 22 [2022-01-18 14:49:28,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:28,927 INFO L470 AbstractCegarLoop]: Abstraction has 1572 states and 6356 transitions. [2022-01-18 14:49:28,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:28,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 6356 transitions. [2022-01-18 14:49:28,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 14:49:28,932 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:28,932 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:28,950 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 14:49:29,148 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 14:49:29,148 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 14:49:29,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:29,149 INFO L85 PathProgramCache]: Analyzing trace with hash 394828654, now seen corresponding path program 1 times [2022-01-18 14:49:29,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:29,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256568191] [2022-01-18 14:49:29,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:29,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:29,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:29,188 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 14:49:29,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:29,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256568191] [2022-01-18 14:49:29,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256568191] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:49:29,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:49:29,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 14:49:29,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834332250] [2022-01-18 14:49:29,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:49:29,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 14:49:29,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:29,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 14:49:29,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:49:29,192 INFO L87 Difference]: Start difference. First operand 1572 states and 6356 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:29,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:29,250 INFO L93 Difference]: Finished difference Result 1994 states and 7722 transitions. [2022-01-18 14:49:29,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 14:49:29,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 14:49:29,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:29,261 INFO L225 Difference]: With dead ends: 1994 [2022-01-18 14:49:29,261 INFO L226 Difference]: Without dead ends: 1957 [2022-01-18 14:49:29,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:49:29,265 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 38 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:29,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 41 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:49:29,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2022-01-18 14:49:29,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1691. [2022-01-18 14:49:29,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1690 states have (on average 3.973372781065089) internal successors, (6715), 1690 states have internal predecessors, (6715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:29,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 6715 transitions. [2022-01-18 14:49:29,314 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 6715 transitions. Word has length 22 [2022-01-18 14:49:29,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:29,314 INFO L470 AbstractCegarLoop]: Abstraction has 1691 states and 6715 transitions. [2022-01-18 14:49:29,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:29,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 6715 transitions. [2022-01-18 14:49:29,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 14:49:29,319 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:29,319 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:29,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 14:49:29,319 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 14:49:29,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:29,319 INFO L85 PathProgramCache]: Analyzing trace with hash -419159677, now seen corresponding path program 1 times [2022-01-18 14:49:29,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:29,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734932220] [2022-01-18 14:49:29,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:29,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:29,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:29,356 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 14:49:29,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:29,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734932220] [2022-01-18 14:49:29,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734932220] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:49:29,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:49:29,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 14:49:29,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854448733] [2022-01-18 14:49:29,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:49:29,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 14:49:29,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:29,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 14:49:29,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:49:29,359 INFO L87 Difference]: Start difference. First operand 1691 states and 6715 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:29,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:29,425 INFO L93 Difference]: Finished difference Result 2484 states and 9587 transitions. [2022-01-18 14:49:29,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 14:49:29,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 14:49:29,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:29,443 INFO L225 Difference]: With dead ends: 2484 [2022-01-18 14:49:29,444 INFO L226 Difference]: Without dead ends: 2464 [2022-01-18 14:49:29,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:49:29,444 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 57 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:29,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 51 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:49:29,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2464 states. [2022-01-18 14:49:29,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2464 to 1763. [2022-01-18 14:49:29,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1762 states have (on average 3.9415437003405223) internal successors, (6945), 1762 states have internal predecessors, (6945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:29,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 6945 transitions. [2022-01-18 14:49:29,494 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 6945 transitions. Word has length 22 [2022-01-18 14:49:29,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:29,494 INFO L470 AbstractCegarLoop]: Abstraction has 1763 states and 6945 transitions. [2022-01-18 14:49:29,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:29,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 6945 transitions. [2022-01-18 14:49:29,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 14:49:29,499 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:29,499 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:29,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 14:49:29,499 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 14:49:29,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:29,500 INFO L85 PathProgramCache]: Analyzing trace with hash -295891366, now seen corresponding path program 2 times [2022-01-18 14:49:29,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:29,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220440266] [2022-01-18 14:49:29,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:29,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:29,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:29,551 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 14:49:29,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:29,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220440266] [2022-01-18 14:49:29,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220440266] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:49:29,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:49:29,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 14:49:29,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118380093] [2022-01-18 14:49:29,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:49:29,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 14:49:29,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:29,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 14:49:29,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:49:29,553 INFO L87 Difference]: Start difference. First operand 1763 states and 6945 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:29,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:29,629 INFO L93 Difference]: Finished difference Result 2218 states and 8604 transitions. [2022-01-18 14:49:29,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 14:49:29,629 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 14:49:29,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:29,640 INFO L225 Difference]: With dead ends: 2218 [2022-01-18 14:49:29,640 INFO L226 Difference]: Without dead ends: 2218 [2022-01-18 14:49:29,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:49:29,641 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 62 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:29,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 60 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:49:29,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2022-01-18 14:49:29,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 1919. [2022-01-18 14:49:29,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1918 states have (on average 3.946298227320125) internal successors, (7569), 1918 states have internal predecessors, (7569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:29,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 7569 transitions. [2022-01-18 14:49:29,697 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 7569 transitions. Word has length 22 [2022-01-18 14:49:29,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:29,697 INFO L470 AbstractCegarLoop]: Abstraction has 1919 states and 7569 transitions. [2022-01-18 14:49:29,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:29,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 7569 transitions. [2022-01-18 14:49:29,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 14:49:29,701 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:29,701 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:29,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-18 14:49:29,702 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 14:49:29,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:29,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1117416331, now seen corresponding path program 2 times [2022-01-18 14:49:29,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:29,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240080615] [2022-01-18 14:49:29,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:29,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:29,742 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 14:49:29,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:29,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240080615] [2022-01-18 14:49:29,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240080615] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:49:29,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:49:29,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 14:49:29,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630451809] [2022-01-18 14:49:29,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:49:29,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 14:49:29,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:29,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 14:49:29,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:49:29,744 INFO L87 Difference]: Start difference. First operand 1919 states and 7569 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:29,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:29,803 INFO L93 Difference]: Finished difference Result 2879 states and 11172 transitions. [2022-01-18 14:49:29,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 14:49:29,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 14:49:29,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:29,821 INFO L225 Difference]: With dead ends: 2879 [2022-01-18 14:49:29,821 INFO L226 Difference]: Without dead ends: 2879 [2022-01-18 14:49:29,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:49:29,822 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 53 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:29,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 57 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:49:29,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2879 states. [2022-01-18 14:49:29,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2879 to 2176. [2022-01-18 14:49:29,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.964137931034483) internal successors, (8622), 2175 states have internal predecessors, (8622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:29,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 8622 transitions. [2022-01-18 14:49:29,887 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 8622 transitions. Word has length 22 [2022-01-18 14:49:29,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:29,887 INFO L470 AbstractCegarLoop]: Abstraction has 2176 states and 8622 transitions. [2022-01-18 14:49:29,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:29,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 8622 transitions. [2022-01-18 14:49:29,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 14:49:29,893 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:29,893 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:29,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-18 14:49:29,893 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 14:49:29,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:29,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1614170840, now seen corresponding path program 2 times [2022-01-18 14:49:29,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:29,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156584410] [2022-01-18 14:49:29,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:29,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:29,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:29,924 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 14:49:29,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:29,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156584410] [2022-01-18 14:49:29,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156584410] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:49:29,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:49:29,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 14:49:29,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791308901] [2022-01-18 14:49:29,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:49:29,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 14:49:29,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:29,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 14:49:29,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:49:29,927 INFO L87 Difference]: Start difference. First operand 2176 states and 8622 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:29,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:29,979 INFO L93 Difference]: Finished difference Result 2839 states and 10862 transitions. [2022-01-18 14:49:29,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 14:49:29,979 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 14:49:29,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:29,987 INFO L225 Difference]: With dead ends: 2839 [2022-01-18 14:49:29,987 INFO L226 Difference]: Without dead ends: 2811 [2022-01-18 14:49:29,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:49:29,988 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 58 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:29,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 52 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:49:29,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2811 states. [2022-01-18 14:49:30,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2811 to 2291. [2022-01-18 14:49:30,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 3.9375545851528386) internal successors, (9017), 2290 states have internal predecessors, (9017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:30,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 9017 transitions. [2022-01-18 14:49:30,040 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 9017 transitions. Word has length 22 [2022-01-18 14:49:30,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:30,041 INFO L470 AbstractCegarLoop]: Abstraction has 2291 states and 9017 transitions. [2022-01-18 14:49:30,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:30,041 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 9017 transitions. [2022-01-18 14:49:30,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:49:30,047 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:30,047 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:30,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-18 14:49:30,048 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 14:49:30,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:30,048 INFO L85 PathProgramCache]: Analyzing trace with hash 94406160, now seen corresponding path program 1 times [2022-01-18 14:49:30,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:30,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113443318] [2022-01-18 14:49:30,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:30,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:30,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:30,132 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 14:49:30,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:30,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113443318] [2022-01-18 14:49:30,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113443318] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:49:30,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264451999] [2022-01-18 14:49:30,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:30,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:30,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:30,133 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 14:49:30,134 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 14:49:30,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:30,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:49:30,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:49:30,450 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 14:49:30,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:49:30,567 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 14:49:30,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264451999] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:49:30,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:49:30,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 6 [2022-01-18 14:49:30,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360781285] [2022-01-18 14:49:30,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:49:30,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:49:30,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:30,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:49:30,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:49:30,569 INFO L87 Difference]: Start difference. First operand 2291 states and 9017 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:30,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:30,831 INFO L93 Difference]: Finished difference Result 3791 states and 14505 transitions. [2022-01-18 14:49:30,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:49:30,831 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 14:49:30,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:30,841 INFO L225 Difference]: With dead ends: 3791 [2022-01-18 14:49:30,842 INFO L226 Difference]: Without dead ends: 3655 [2022-01-18 14:49:30,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:49:30,842 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 64 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:30,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 101 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:49:30,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3655 states. [2022-01-18 14:49:30,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3655 to 2656. [2022-01-18 14:49:30,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2656 states, 2655 states have (on average 3.9450094161958567) internal successors, (10474), 2655 states have internal predecessors, (10474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:30,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 10474 transitions. [2022-01-18 14:49:30,896 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 10474 transitions. Word has length 25 [2022-01-18 14:49:30,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:30,896 INFO L470 AbstractCegarLoop]: Abstraction has 2656 states and 10474 transitions. [2022-01-18 14:49:30,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:30,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 10474 transitions. [2022-01-18 14:49:30,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:49:30,901 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:30,902 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:30,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-18 14:49:31,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:31,118 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 14:49:31,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:31,118 INFO L85 PathProgramCache]: Analyzing trace with hash 661659470, now seen corresponding path program 2 times [2022-01-18 14:49:31,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:31,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145842571] [2022-01-18 14:49:31,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:31,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:31,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:49:31,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:31,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145842571] [2022-01-18 14:49:31,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145842571] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:49:31,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442861088] [2022-01-18 14:49:31,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:49:31,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:31,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:31,166 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 14:49:31,179 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 14:49:31,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:49:31,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:49:31,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:49:31,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:49:31,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:31,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:49:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:49:31,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442861088] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:49:31,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:49:31,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 7 [2022-01-18 14:49:31,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280895993] [2022-01-18 14:49:31,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:49:31,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:49:31,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:31,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:49:31,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:49:31,594 INFO L87 Difference]: Start difference. First operand 2656 states and 10474 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 14:49:31,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:31,885 INFO L93 Difference]: Finished difference Result 4004 states and 15422 transitions. [2022-01-18 14:49:31,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 14:49:31,885 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 25 [2022-01-18 14:49:31,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:31,899 INFO L225 Difference]: With dead ends: 4004 [2022-01-18 14:49:31,900 INFO L226 Difference]: Without dead ends: 3868 [2022-01-18 14:49:31,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:49:31,900 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 82 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:31,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 95 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:49:31,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3868 states. [2022-01-18 14:49:31,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3868 to 2991. [2022-01-18 14:49:31,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2990 states have (on average 3.9638795986622073) internal successors, (11852), 2990 states have internal predecessors, (11852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:31,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 11852 transitions. [2022-01-18 14:49:31,979 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 11852 transitions. Word has length 25 [2022-01-18 14:49:31,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:31,980 INFO L470 AbstractCegarLoop]: Abstraction has 2991 states and 11852 transitions. [2022-01-18 14:49:31,980 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 14:49:31,980 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 11852 transitions. [2022-01-18 14:49:32,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:49:32,011 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:32,012 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:32,041 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 14:49:32,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:32,241 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 14:49:32,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:32,242 INFO L85 PathProgramCache]: Analyzing trace with hash 2111245980, now seen corresponding path program 3 times [2022-01-18 14:49:32,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:32,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697239240] [2022-01-18 14:49:32,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:32,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:32,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:32,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:49:32,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:32,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697239240] [2022-01-18 14:49:32,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697239240] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:49:32,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:49:32,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 14:49:32,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499834385] [2022-01-18 14:49:32,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:49:32,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 14:49:32,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:32,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 14:49:32,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:49:32,298 INFO L87 Difference]: Start difference. First operand 2991 states and 11852 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:32,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:32,438 INFO L93 Difference]: Finished difference Result 4207 states and 16326 transitions. [2022-01-18 14:49:32,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 14:49:32,439 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 14:49:32,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:32,454 INFO L225 Difference]: With dead ends: 4207 [2022-01-18 14:49:32,454 INFO L226 Difference]: Without dead ends: 4139 [2022-01-18 14:49:32,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:49:32,455 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:32,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 51 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:49:32,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4139 states. [2022-01-18 14:49:32,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4139 to 3438. [2022-01-18 14:49:32,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 3437 states have (on average 3.9793424498108814) internal successors, (13677), 3437 states have internal predecessors, (13677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:32,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 13677 transitions. [2022-01-18 14:49:32,545 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 13677 transitions. Word has length 25 [2022-01-18 14:49:32,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:32,547 INFO L470 AbstractCegarLoop]: Abstraction has 3438 states and 13677 transitions. [2022-01-18 14:49:32,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:32,547 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 13677 transitions. [2022-01-18 14:49:32,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:49:32,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:32,557 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:32,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-18 14:49:32,558 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 14:49:32,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:32,558 INFO L85 PathProgramCache]: Analyzing trace with hash -12774180, now seen corresponding path program 1 times [2022-01-18 14:49:32,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:32,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548615623] [2022-01-18 14:49:32,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:32,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:32,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:32,619 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 14:49:32,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:32,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548615623] [2022-01-18 14:49:32,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548615623] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:49:32,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920084071] [2022-01-18 14:49:32,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:32,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:32,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:32,636 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 14:49:32,636 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 14:49:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:32,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:49:32,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:49:32,932 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 14:49:32,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:49:33,052 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 14:49:33,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920084071] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:49:33,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:49:33,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 6 [2022-01-18 14:49:33,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982825768] [2022-01-18 14:49:33,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:49:33,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:49:33,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:33,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:49:33,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:49:33,053 INFO L87 Difference]: Start difference. First operand 3438 states and 13677 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:33,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:33,349 INFO L93 Difference]: Finished difference Result 4729 states and 18310 transitions. [2022-01-18 14:49:33,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:49:33,350 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 14:49:33,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:33,368 INFO L225 Difference]: With dead ends: 4729 [2022-01-18 14:49:33,368 INFO L226 Difference]: Without dead ends: 4627 [2022-01-18 14:49:33,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 8 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:49:33,369 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 65 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:33,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 104 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:49:33,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4627 states. [2022-01-18 14:49:33,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4627 to 3870. [2022-01-18 14:49:33,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3870 states, 3869 states have (on average 3.958904109589041) internal successors, (15317), 3869 states have internal predecessors, (15317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:33,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 15317 transitions. [2022-01-18 14:49:33,544 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 15317 transitions. Word has length 25 [2022-01-18 14:49:33,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:33,545 INFO L470 AbstractCegarLoop]: Abstraction has 3870 states and 15317 transitions. [2022-01-18 14:49:33,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:33,545 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 15317 transitions. [2022-01-18 14:49:33,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:49:33,556 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:33,556 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:33,595 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 14:49:33,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-18 14:49:33,772 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 14:49:33,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:33,772 INFO L85 PathProgramCache]: Analyzing trace with hash -418861160, now seen corresponding path program 2 times [2022-01-18 14:49:33,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:33,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772874170] [2022-01-18 14:49:33,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:33,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:33,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:33,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:49:33,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:33,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772874170] [2022-01-18 14:49:33,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772874170] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:49:33,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132481533] [2022-01-18 14:49:33,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:49:33,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:33,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:33,837 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 14:49:33,838 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 14:49:33,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:49:33,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:49:33,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:49:33,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:49:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:34,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:49:34,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:49:34,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132481533] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:49:34,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:49:34,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 7 [2022-01-18 14:49:34,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466502434] [2022-01-18 14:49:34,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:49:34,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:49:34,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:34,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:49:34,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:49:34,356 INFO L87 Difference]: Start difference. First operand 3870 states and 15317 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:34,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:34,625 INFO L93 Difference]: Finished difference Result 4946 states and 19222 transitions. [2022-01-18 14:49:34,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 14:49:34,625 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 14:49:34,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:34,639 INFO L225 Difference]: With dead ends: 4946 [2022-01-18 14:49:34,639 INFO L226 Difference]: Without dead ends: 4844 [2022-01-18 14:49:34,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 9 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:49:34,640 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 76 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:34,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 108 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:49:34,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4844 states. [2022-01-18 14:49:34,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4844 to 4195. [2022-01-18 14:49:34,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4195 states, 4194 states have (on average 3.966618979494516) internal successors, (16636), 4194 states have internal predecessors, (16636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:34,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4195 states to 4195 states and 16636 transitions. [2022-01-18 14:49:34,716 INFO L78 Accepts]: Start accepts. Automaton has 4195 states and 16636 transitions. Word has length 25 [2022-01-18 14:49:34,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:34,716 INFO L470 AbstractCegarLoop]: Abstraction has 4195 states and 16636 transitions. [2022-01-18 14:49:34,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:34,716 INFO L276 IsEmpty]: Start isEmpty. Operand 4195 states and 16636 transitions. [2022-01-18 14:49:34,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:49:34,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:34,725 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:34,743 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 14:49:34,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:34,939 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 14:49:34,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:34,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1398947880, now seen corresponding path program 3 times [2022-01-18 14:49:34,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:34,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610844664] [2022-01-18 14:49:34,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:34,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:34,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:34,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:49:34,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:34,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610844664] [2022-01-18 14:49:34,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610844664] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:49:34,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:49:34,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 14:49:34,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421331282] [2022-01-18 14:49:34,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:49:34,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 14:49:34,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:34,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 14:49:34,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:49:34,988 INFO L87 Difference]: Start difference. First operand 4195 states and 16636 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:35,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:35,118 INFO L93 Difference]: Finished difference Result 5169 states and 20167 transitions. [2022-01-18 14:49:35,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 14:49:35,119 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 14:49:35,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:35,132 INFO L225 Difference]: With dead ends: 5169 [2022-01-18 14:49:35,132 INFO L226 Difference]: Without dead ends: 5118 [2022-01-18 14:49:35,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:49:35,133 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 35 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:35,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 52 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:49:35,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5118 states. [2022-01-18 14:49:35,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5118 to 4611. [2022-01-18 14:49:35,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4611 states, 4610 states have (on average 3.9731019522776574) internal successors, (18316), 4610 states have internal predecessors, (18316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:35,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4611 states to 4611 states and 18316 transitions. [2022-01-18 14:49:35,252 INFO L78 Accepts]: Start accepts. Automaton has 4611 states and 18316 transitions. Word has length 25 [2022-01-18 14:49:35,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:35,253 INFO L470 AbstractCegarLoop]: Abstraction has 4611 states and 18316 transitions. [2022-01-18 14:49:35,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:35,253 INFO L276 IsEmpty]: Start isEmpty. Operand 4611 states and 18316 transitions. [2022-01-18 14:49:35,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:49:35,262 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:35,262 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:35,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-18 14:49:35,263 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 14:49:35,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:35,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1060747875, now seen corresponding path program 4 times [2022-01-18 14:49:35,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:35,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90466740] [2022-01-18 14:49:35,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:35,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:35,301 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 14:49:35,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:35,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90466740] [2022-01-18 14:49:35,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90466740] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:49:35,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043011019] [2022-01-18 14:49:35,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:49:35,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:35,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:35,303 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 14:49:35,327 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 14:49:35,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:49:35,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:49:35,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:49:35,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:49:35,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:35,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:49:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:35,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043011019] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:49:35,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:49:35,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-01-18 14:49:35,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412218387] [2022-01-18 14:49:35,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:49:35,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:49:35,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:35,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:49:35,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:49:35,472 INFO L87 Difference]: Start difference. First operand 4611 states and 18316 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:36,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:36,232 INFO L93 Difference]: Finished difference Result 11402 states and 44327 transitions. [2022-01-18 14:49:36,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 14:49:36,232 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 14:49:36,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:36,262 INFO L225 Difference]: With dead ends: 11402 [2022-01-18 14:49:36,262 INFO L226 Difference]: Without dead ends: 11402 [2022-01-18 14:49:36,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 14:49:36,263 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 368 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:36,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 665 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:49:36,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11402 states. [2022-01-18 14:49:36,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11402 to 5821. [2022-01-18 14:49:36,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5821 states, 5820 states have (on average 4.016151202749141) internal successors, (23374), 5820 states have internal predecessors, (23374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:36,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5821 states to 5821 states and 23374 transitions. [2022-01-18 14:49:36,415 INFO L78 Accepts]: Start accepts. Automaton has 5821 states and 23374 transitions. Word has length 28 [2022-01-18 14:49:36,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:36,416 INFO L470 AbstractCegarLoop]: Abstraction has 5821 states and 23374 transitions. [2022-01-18 14:49:36,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:36,416 INFO L276 IsEmpty]: Start isEmpty. Operand 5821 states and 23374 transitions. [2022-01-18 14:49:36,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:49:36,427 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:36,427 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:36,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-18 14:49:36,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:36,643 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 14:49:36,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:36,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1873088312, now seen corresponding path program 5 times [2022-01-18 14:49:36,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:36,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164929915] [2022-01-18 14:49:36,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:36,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:36,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:36,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:36,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:36,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164929915] [2022-01-18 14:49:36,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164929915] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:49:36,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309595716] [2022-01-18 14:49:36,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:49:36,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:36,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:36,682 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 14:49:36,683 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 14:49:36,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:49:36,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:49:36,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:49:36,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:49:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:36,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:49:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:36,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309595716] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:49:36,846 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:49:36,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-01-18 14:49:36,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775634770] [2022-01-18 14:49:36,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:49:36,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:49:36,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:36,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:49:36,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:49:36,848 INFO L87 Difference]: Start difference. First operand 5821 states and 23374 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:37,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:37,464 INFO L93 Difference]: Finished difference Result 15383 states and 58771 transitions. [2022-01-18 14:49:37,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 14:49:37,464 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 14:49:37,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:37,501 INFO L225 Difference]: With dead ends: 15383 [2022-01-18 14:49:37,502 INFO L226 Difference]: Without dead ends: 15203 [2022-01-18 14:49:37,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 14:49:37,502 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 447 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:37,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 467 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:49:37,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15203 states. [2022-01-18 14:49:37,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15203 to 8319. [2022-01-18 14:49:37,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8319 states, 8318 states have (on average 4.118177446501563) internal successors, (34255), 8318 states have internal predecessors, (34255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:37,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8319 states to 8319 states and 34255 transitions. [2022-01-18 14:49:37,730 INFO L78 Accepts]: Start accepts. Automaton has 8319 states and 34255 transitions. Word has length 28 [2022-01-18 14:49:37,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:37,730 INFO L470 AbstractCegarLoop]: Abstraction has 8319 states and 34255 transitions. [2022-01-18 14:49:37,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:37,730 INFO L276 IsEmpty]: Start isEmpty. Operand 8319 states and 34255 transitions. [2022-01-18 14:49:37,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:49:37,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:37,747 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:37,762 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 14:49:37,948 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,SelfDestructingSolverStorable15 [2022-01-18 14:49:37,948 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 14:49:37,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:37,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1274103240, now seen corresponding path program 6 times [2022-01-18 14:49:37,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:37,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721440325] [2022-01-18 14:49:37,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:37,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:37,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:37,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:37,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:37,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721440325] [2022-01-18 14:49:37,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721440325] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:49:37,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981411413] [2022-01-18 14:49:37,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:49:37,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:37,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:37,982 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 14:49:37,983 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 14:49:38,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:49:38,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:49:38,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:49:38,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:49:38,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:38,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:49:38,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:38,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981411413] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:49:38,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:49:38,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 8 [2022-01-18 14:49:38,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262994067] [2022-01-18 14:49:38,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:49:38,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:49:38,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:38,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:49:38,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:49:38,166 INFO L87 Difference]: Start difference. First operand 8319 states and 34255 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:38,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:38,605 INFO L93 Difference]: Finished difference Result 16184 states and 62633 transitions. [2022-01-18 14:49:38,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 14:49:38,605 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 14:49:38,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:38,644 INFO L225 Difference]: With dead ends: 16184 [2022-01-18 14:49:38,645 INFO L226 Difference]: Without dead ends: 16184 [2022-01-18 14:49:38,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:49:38,645 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 452 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:38,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 323 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:49:38,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16184 states. [2022-01-18 14:49:38,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16184 to 8319. [2022-01-18 14:49:38,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8319 states, 8318 states have (on average 4.099062274585237) internal successors, (34096), 8318 states have internal predecessors, (34096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:38,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8319 states to 8319 states and 34096 transitions. [2022-01-18 14:49:38,867 INFO L78 Accepts]: Start accepts. Automaton has 8319 states and 34096 transitions. Word has length 28 [2022-01-18 14:49:38,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:38,868 INFO L470 AbstractCegarLoop]: Abstraction has 8319 states and 34096 transitions. [2022-01-18 14:49:38,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:38,868 INFO L276 IsEmpty]: Start isEmpty. Operand 8319 states and 34096 transitions. [2022-01-18 14:49:38,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:49:38,884 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:38,884 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:38,899 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 14:49:39,084 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,SelfDestructingSolverStorable16 [2022-01-18 14:49:39,084 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 14:49:39,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:39,085 INFO L85 PathProgramCache]: Analyzing trace with hash 289276885, now seen corresponding path program 7 times [2022-01-18 14:49:39,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:39,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501355219] [2022-01-18 14:49:39,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:39,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:39,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:39,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:39,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:39,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501355219] [2022-01-18 14:49:39,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501355219] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:49:39,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623740168] [2022-01-18 14:49:39,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:49:39,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:39,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:39,128 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 14:49:39,131 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 14:49:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:39,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:49:39,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:49:39,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:39,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:49:39,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:39,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623740168] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:49:39,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:49:39,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 8 [2022-01-18 14:49:39,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774131661] [2022-01-18 14:49:39,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:49:39,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:49:39,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:39,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:49:39,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:49:39,333 INFO L87 Difference]: Start difference. First operand 8319 states and 34096 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:39,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:39,637 INFO L93 Difference]: Finished difference Result 10083 states and 39959 transitions. [2022-01-18 14:49:39,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 14:49:39,637 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 14:49:39,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:39,663 INFO L225 Difference]: With dead ends: 10083 [2022-01-18 14:49:39,663 INFO L226 Difference]: Without dead ends: 10027 [2022-01-18 14:49:39,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:49:39,664 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 198 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:39,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 356 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:49:39,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10027 states. [2022-01-18 14:49:39,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10027 to 8326. [2022-01-18 14:49:39,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8326 states, 8325 states have (on average 4.095975975975976) internal successors, (34099), 8325 states have internal predecessors, (34099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:39,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8326 states to 8326 states and 34099 transitions. [2022-01-18 14:49:39,852 INFO L78 Accepts]: Start accepts. Automaton has 8326 states and 34099 transitions. Word has length 28 [2022-01-18 14:49:39,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:39,853 INFO L470 AbstractCegarLoop]: Abstraction has 8326 states and 34099 transitions. [2022-01-18 14:49:39,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:39,853 INFO L276 IsEmpty]: Start isEmpty. Operand 8326 states and 34099 transitions. [2022-01-18 14:49:39,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:49:39,868 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:39,868 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:39,884 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 14:49:40,069 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,SelfDestructingSolverStorable17 [2022-01-18 14:49:40,069 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 14:49:40,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:40,069 INFO L85 PathProgramCache]: Analyzing trace with hash 241482535, now seen corresponding path program 8 times [2022-01-18 14:49:40,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:40,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299007800] [2022-01-18 14:49:40,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:40,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:40,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:40,093 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 14:49:40,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:40,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299007800] [2022-01-18 14:49:40,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299007800] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:49:40,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110567315] [2022-01-18 14:49:40,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:49:40,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:40,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:40,094 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 14:49:40,096 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 14:49:40,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:49:40,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:49:40,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:49:40,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:49:40,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:40,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:49:40,264 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 14:49:40,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110567315] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:49:40,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:49:40,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 9 [2022-01-18 14:49:40,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33877140] [2022-01-18 14:49:40,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:49:40,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:49:40,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:40,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:49:40,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:49:40,265 INFO L87 Difference]: Start difference. First operand 8326 states and 34099 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 14:49:40,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:40,762 INFO L93 Difference]: Finished difference Result 17529 states and 67736 transitions. [2022-01-18 14:49:40,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 14:49:40,762 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 28 [2022-01-18 14:49:40,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:40,811 INFO L225 Difference]: With dead ends: 17529 [2022-01-18 14:49:40,811 INFO L226 Difference]: Without dead ends: 17529 [2022-01-18 14:49:40,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:49:40,812 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 439 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:40,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 407 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:49:40,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17529 states. [2022-01-18 14:49:41,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17529 to 8432. [2022-01-18 14:49:41,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8432 states, 8431 states have (on average 4.087296880559839) internal successors, (34460), 8431 states have internal predecessors, (34460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:41,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8432 states to 8432 states and 34460 transitions. [2022-01-18 14:49:41,109 INFO L78 Accepts]: Start accepts. Automaton has 8432 states and 34460 transitions. Word has length 28 [2022-01-18 14:49:41,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:41,110 INFO L470 AbstractCegarLoop]: Abstraction has 8432 states and 34460 transitions. [2022-01-18 14:49:41,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 14:49:41,110 INFO L276 IsEmpty]: Start isEmpty. Operand 8432 states and 34460 transitions. [2022-01-18 14:49:41,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:49:41,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:41,126 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:41,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-01-18 14:49:41,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:41,327 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 14:49:41,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:41,327 INFO L85 PathProgramCache]: Analyzing trace with hash 220136762, now seen corresponding path program 9 times [2022-01-18 14:49:41,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:41,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441908442] [2022-01-18 14:49:41,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:41,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:41,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:41,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:49:41,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:41,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441908442] [2022-01-18 14:49:41,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441908442] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:49:41,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739657574] [2022-01-18 14:49:41,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:49:41,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:41,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:41,353 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 14:49:41,354 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 14:49:41,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 14:49:41,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:49:41,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:49:41,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:49:41,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:41,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:49:41,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:49:41,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739657574] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:49:41,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:49:41,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 9 [2022-01-18 14:49:41,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293009521] [2022-01-18 14:49:41,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:49:41,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:49:41,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:41,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:49:41,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:49:41,552 INFO L87 Difference]: Start difference. First operand 8432 states and 34460 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:42,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:42,043 INFO L93 Difference]: Finished difference Result 15647 states and 60285 transitions. [2022-01-18 14:49:42,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 14:49:42,043 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 14:49:42,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:42,084 INFO L225 Difference]: With dead ends: 15647 [2022-01-18 14:49:42,085 INFO L226 Difference]: Without dead ends: 15587 [2022-01-18 14:49:42,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:49:42,086 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 294 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:42,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 526 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:49:42,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15587 states. [2022-01-18 14:49:42,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15587 to 8432. [2022-01-18 14:49:42,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8432 states, 8431 states have (on average 4.084924682718539) internal successors, (34440), 8431 states have internal predecessors, (34440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:42,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8432 states to 8432 states and 34440 transitions. [2022-01-18 14:49:42,301 INFO L78 Accepts]: Start accepts. Automaton has 8432 states and 34440 transitions. Word has length 28 [2022-01-18 14:49:42,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:42,301 INFO L470 AbstractCegarLoop]: Abstraction has 8432 states and 34440 transitions. [2022-01-18 14:49:42,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:42,301 INFO L276 IsEmpty]: Start isEmpty. Operand 8432 states and 34440 transitions. [2022-01-18 14:49:42,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:49:42,316 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:42,316 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:42,335 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 14:49:42,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:42,517 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 14:49:42,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:42,517 INFO L85 PathProgramCache]: Analyzing trace with hash 993498946, now seen corresponding path program 10 times [2022-01-18 14:49:42,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:42,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966033471] [2022-01-18 14:49:42,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:42,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:42,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:42,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:42,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966033471] [2022-01-18 14:49:42,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966033471] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:49:42,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795298362] [2022-01-18 14:49:42,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:49:42,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:42,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:42,547 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 14:49:42,548 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 14:49:42,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:49:42,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:49:42,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:49:42,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:49:42,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:42,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:49:42,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:42,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795298362] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:49:42,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:49:42,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 9 [2022-01-18 14:49:42,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83734443] [2022-01-18 14:49:42,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:49:42,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:49:42,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:42,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:49:42,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:49:42,696 INFO L87 Difference]: Start difference. First operand 8432 states and 34440 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:43,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:43,313 INFO L93 Difference]: Finished difference Result 18798 states and 72632 transitions. [2022-01-18 14:49:43,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 14:49:43,313 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 14:49:43,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:43,359 INFO L225 Difference]: With dead ends: 18798 [2022-01-18 14:49:43,360 INFO L226 Difference]: Without dead ends: 18798 [2022-01-18 14:49:43,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:49:43,360 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 392 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:43,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 525 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:49:43,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18798 states. [2022-01-18 14:49:43,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18798 to 8538. [2022-01-18 14:49:43,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8538 states, 8537 states have (on average 4.08269884034204) internal successors, (34854), 8537 states have internal predecessors, (34854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:43,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8538 states to 8538 states and 34854 transitions. [2022-01-18 14:49:43,593 INFO L78 Accepts]: Start accepts. Automaton has 8538 states and 34854 transitions. Word has length 28 [2022-01-18 14:49:43,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:43,593 INFO L470 AbstractCegarLoop]: Abstraction has 8538 states and 34854 transitions. [2022-01-18 14:49:43,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:43,593 INFO L276 IsEmpty]: Start isEmpty. Operand 8538 states and 34854 transitions. [2022-01-18 14:49:43,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:49:43,607 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:43,608 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:43,625 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 14:49:43,809 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,SelfDestructingSolverStorable20 [2022-01-18 14:49:43,809 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 14:49:43,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:43,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1738088225, now seen corresponding path program 11 times [2022-01-18 14:49:43,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:43,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289642563] [2022-01-18 14:49:43,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:43,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:43,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:43,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:43,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289642563] [2022-01-18 14:49:43,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289642563] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:49:43,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913877890] [2022-01-18 14:49:43,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:49:43,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:43,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:43,831 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 14:49:43,832 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 14:49:43,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:49:43,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:49:43,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:49:43,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:49:43,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:43,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:49:43,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:43,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913877890] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:49:43,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:49:43,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 9 [2022-01-18 14:49:43,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580022155] [2022-01-18 14:49:43,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:49:43,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:49:43,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:43,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:49:43,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:49:43,980 INFO L87 Difference]: Start difference. First operand 8538 states and 34854 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:44,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:44,440 INFO L93 Difference]: Finished difference Result 14070 states and 54143 transitions. [2022-01-18 14:49:44,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 14:49:44,440 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 14:49:44,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:44,474 INFO L225 Difference]: With dead ends: 14070 [2022-01-18 14:49:44,475 INFO L226 Difference]: Without dead ends: 14014 [2022-01-18 14:49:44,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-01-18 14:49:44,475 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 326 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:44,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 489 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:49:44,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14014 states. [2022-01-18 14:49:44,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14014 to 8538. [2022-01-18 14:49:44,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8538 states, 8537 states have (on average 4.080356096989575) internal successors, (34834), 8537 states have internal predecessors, (34834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:44,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8538 states to 8538 states and 34834 transitions. [2022-01-18 14:49:44,741 INFO L78 Accepts]: Start accepts. Automaton has 8538 states and 34834 transitions. Word has length 28 [2022-01-18 14:49:44,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:44,741 INFO L470 AbstractCegarLoop]: Abstraction has 8538 states and 34834 transitions. [2022-01-18 14:49:44,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:44,741 INFO L276 IsEmpty]: Start isEmpty. Operand 8538 states and 34834 transitions. [2022-01-18 14:49:44,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:49:44,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:44,757 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:44,772 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 14:49:44,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:44,958 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 14:49:44,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:44,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1830310576, now seen corresponding path program 12 times [2022-01-18 14:49:44,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:44,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352924167] [2022-01-18 14:49:44,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:44,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:44,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:44,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:44,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352924167] [2022-01-18 14:49:44,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352924167] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:49:44,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061680443] [2022-01-18 14:49:44,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:49:44,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:44,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:44,996 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 14:49:44,996 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 14:49:45,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:49:45,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:49:45,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:49:45,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:49:45,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:45,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:49:45,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:45,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061680443] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:49:45,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:49:45,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-01-18 14:49:45,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570849287] [2022-01-18 14:49:45,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:49:45,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:49:45,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:45,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:49:45,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:49:45,160 INFO L87 Difference]: Start difference. First operand 8538 states and 34834 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:45,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:45,911 INFO L93 Difference]: Finished difference Result 18926 states and 73169 transitions. [2022-01-18 14:49:45,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 14:49:45,911 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 14:49:45,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:45,966 INFO L225 Difference]: With dead ends: 18926 [2022-01-18 14:49:45,966 INFO L226 Difference]: Without dead ends: 18926 [2022-01-18 14:49:45,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2022-01-18 14:49:45,967 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 395 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:45,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 664 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:49:45,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18926 states. [2022-01-18 14:49:46,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18926 to 8689. [2022-01-18 14:49:46,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8689 states, 8688 states have (on average 4.058586556169429) internal successors, (35261), 8688 states have internal predecessors, (35261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:46,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8689 states to 8689 states and 35261 transitions. [2022-01-18 14:49:46,289 INFO L78 Accepts]: Start accepts. Automaton has 8689 states and 35261 transitions. Word has length 28 [2022-01-18 14:49:46,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:46,289 INFO L470 AbstractCegarLoop]: Abstraction has 8689 states and 35261 transitions. [2022-01-18 14:49:46,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:46,290 INFO L276 IsEmpty]: Start isEmpty. Operand 8689 states and 35261 transitions. [2022-01-18 14:49:46,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:49:46,305 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:46,305 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:46,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 14:49:46,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:46,507 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 14:49:46,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:46,507 INFO L85 PathProgramCache]: Analyzing trace with hash -2104471513, now seen corresponding path program 13 times [2022-01-18 14:49:46,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:46,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336134892] [2022-01-18 14:49:46,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:46,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:46,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:46,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:46,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:46,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336134892] [2022-01-18 14:49:46,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336134892] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:49:46,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77404217] [2022-01-18 14:49:46,536 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:49:46,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:46,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:46,537 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 14:49:46,538 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 14:49:46,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:46,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:49:46,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:49:46,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:46,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:49:46,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:46,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77404217] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:49:46,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:49:46,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-01-18 14:49:46,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589786946] [2022-01-18 14:49:46,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:49:46,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:49:46,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:46,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:49:46,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:49:46,697 INFO L87 Difference]: Start difference. First operand 8689 states and 35261 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:47,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:47,175 INFO L93 Difference]: Finished difference Result 12612 states and 48542 transitions. [2022-01-18 14:49:47,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 14:49:47,175 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 14:49:47,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:47,207 INFO L225 Difference]: With dead ends: 12612 [2022-01-18 14:49:47,207 INFO L226 Difference]: Without dead ends: 12556 [2022-01-18 14:49:47,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:49:47,208 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 369 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:47,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 482 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:49:47,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12556 states. [2022-01-18 14:49:47,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12556 to 8811. [2022-01-18 14:49:47,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8811 states, 8810 states have (on average 4.050397275822928) internal successors, (35684), 8810 states have internal predecessors, (35684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:47,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 35684 transitions. [2022-01-18 14:49:47,416 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 35684 transitions. Word has length 28 [2022-01-18 14:49:47,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:47,416 INFO L470 AbstractCegarLoop]: Abstraction has 8811 states and 35684 transitions. [2022-01-18 14:49:47,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:47,416 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 35684 transitions. [2022-01-18 14:49:47,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:49:47,433 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:47,433 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:47,452 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 14:49:47,652 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,SelfDestructingSolverStorable23 [2022-01-18 14:49:47,652 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 14:49:47,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:47,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1022959335, now seen corresponding path program 14 times [2022-01-18 14:49:47,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:47,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77660496] [2022-01-18 14:49:47,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:47,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:47,692 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 14:49:47,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:47,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77660496] [2022-01-18 14:49:47,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77660496] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:49:47,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584592199] [2022-01-18 14:49:47,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:49:47,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:47,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:47,694 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 14:49:47,694 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 14:49:47,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:49:47,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:49:47,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:49:47,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:49:47,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:47,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:49:47,844 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 14:49:47,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584592199] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:49:47,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:49:47,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 8 [2022-01-18 14:49:47,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116322720] [2022-01-18 14:49:47,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:49:47,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:49:47,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:47,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:49:47,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:49:47,846 INFO L87 Difference]: Start difference. First operand 8811 states and 35684 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:48,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:48,233 INFO L93 Difference]: Finished difference Result 16530 states and 63291 transitions. [2022-01-18 14:49:48,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 14:49:48,233 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 14:49:48,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:48,326 INFO L225 Difference]: With dead ends: 16530 [2022-01-18 14:49:48,326 INFO L226 Difference]: Without dead ends: 16530 [2022-01-18 14:49:48,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:49:48,327 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 421 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:48,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 308 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:49:48,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16530 states. [2022-01-18 14:49:48,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16530 to 8811. [2022-01-18 14:49:48,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8811 states, 8810 states have (on average 4.044381384790011) internal successors, (35631), 8810 states have internal predecessors, (35631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:48,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 35631 transitions. [2022-01-18 14:49:48,524 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 35631 transitions. Word has length 28 [2022-01-18 14:49:48,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:48,524 INFO L470 AbstractCegarLoop]: Abstraction has 8811 states and 35631 transitions. [2022-01-18 14:49:48,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:48,524 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 35631 transitions. [2022-01-18 14:49:48,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:49:48,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:48,539 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:48,555 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 14:49:48,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:48,743 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 14:49:48,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:48,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1044305108, now seen corresponding path program 15 times [2022-01-18 14:49:48,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:48,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792082511] [2022-01-18 14:49:48,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:48,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:48,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:49:48,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:48,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792082511] [2022-01-18 14:49:48,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792082511] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:49:48,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260948338] [2022-01-18 14:49:48,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:49:48,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:48,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:48,771 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 14:49:48,772 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 14:49:48,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 14:49:48,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:49:48,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:49:48,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:49:48,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:48,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:49:48,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:49:48,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260948338] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:49:48,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:49:48,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 8 [2022-01-18 14:49:48,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614332733] [2022-01-18 14:49:48,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:49:48,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:49:48,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:48,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:49:48,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:49:48,900 INFO L87 Difference]: Start difference. First operand 8811 states and 35631 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:49,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:49,243 INFO L93 Difference]: Finished difference Result 11652 states and 45517 transitions. [2022-01-18 14:49:49,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 14:49:49,244 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 14:49:49,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:49,273 INFO L225 Difference]: With dead ends: 11652 [2022-01-18 14:49:49,274 INFO L226 Difference]: Without dead ends: 11632 [2022-01-18 14:49:49,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:49:49,274 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 183 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:49,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 491 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:49:49,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11632 states. [2022-01-18 14:49:49,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11632 to 8811. [2022-01-18 14:49:49,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8811 states, 8810 states have (on average 4.043246311010216) internal successors, (35621), 8810 states have internal predecessors, (35621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:49,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 35621 transitions. [2022-01-18 14:49:49,438 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 35621 transitions. Word has length 28 [2022-01-18 14:49:49,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:49,438 INFO L470 AbstractCegarLoop]: Abstraction has 8811 states and 35621 transitions. [2022-01-18 14:49:49,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:49,438 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 35621 transitions. [2022-01-18 14:49:49,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:49:49,453 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:49,453 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:49,469 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 14:49:49,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:49,654 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 14:49:49,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:49,654 INFO L85 PathProgramCache]: Analyzing trace with hash -270942924, now seen corresponding path program 16 times [2022-01-18 14:49:49,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:49,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076604525] [2022-01-18 14:49:49,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:49,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:49,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:49:49,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:49,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076604525] [2022-01-18 14:49:49,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076604525] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:49:49,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774190732] [2022-01-18 14:49:49,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:49:49,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:49,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:49,681 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 14:49:49,682 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 14:49:49,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:49:49,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:49:49,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:49:49,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:49:49,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:49,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:49:49,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:49:49,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774190732] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:49:49,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:49:49,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 8 [2022-01-18 14:49:49,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199708982] [2022-01-18 14:49:49,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:49:49,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:49:49,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:49,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:49:49,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:49:49,853 INFO L87 Difference]: Start difference. First operand 8811 states and 35621 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:50,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:50,263 INFO L93 Difference]: Finished difference Result 13573 states and 53112 transitions. [2022-01-18 14:49:50,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 14:49:50,263 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 14:49:50,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:50,302 INFO L225 Difference]: With dead ends: 13573 [2022-01-18 14:49:50,302 INFO L226 Difference]: Without dead ends: 13573 [2022-01-18 14:49:50,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2022-01-18 14:49:50,302 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 297 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:50,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 437 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:49:50,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13573 states. [2022-01-18 14:49:50,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13573 to 8864. [2022-01-18 14:49:50,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8864 states, 8863 states have (on average 4.042423558614464) internal successors, (35828), 8863 states have internal predecessors, (35828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:50,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8864 states to 8864 states and 35828 transitions. [2022-01-18 14:49:50,508 INFO L78 Accepts]: Start accepts. Automaton has 8864 states and 35828 transitions. Word has length 28 [2022-01-18 14:49:50,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:50,508 INFO L470 AbstractCegarLoop]: Abstraction has 8864 states and 35828 transitions. [2022-01-18 14:49:50,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:50,508 INFO L276 IsEmpty]: Start isEmpty. Operand 8864 states and 35828 transitions. [2022-01-18 14:49:50,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:49:50,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:50,525 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:50,540 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 14:49:50,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:50,725 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 14:49:50,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:50,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1292437201, now seen corresponding path program 17 times [2022-01-18 14:49:50,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:50,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738634547] [2022-01-18 14:49:50,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:50,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:50,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:49:50,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:50,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738634547] [2022-01-18 14:49:50,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738634547] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:49:50,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154174906] [2022-01-18 14:49:50,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:49:50,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:50,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:50,758 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 14:49:50,759 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 14:49:50,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:49:50,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:49:50,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:49:50,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:49:50,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:50,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:49:50,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:49:50,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154174906] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:49:50,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:49:50,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 8 [2022-01-18 14:49:50,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327822891] [2022-01-18 14:49:50,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:49:50,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:49:50,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:50,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:49:50,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:49:50,882 INFO L87 Difference]: Start difference. First operand 8864 states and 35828 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:51,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:51,275 INFO L93 Difference]: Finished difference Result 14465 states and 55050 transitions. [2022-01-18 14:49:51,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:49:51,276 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 14:49:51,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:51,311 INFO L225 Difference]: With dead ends: 14465 [2022-01-18 14:49:51,311 INFO L226 Difference]: Without dead ends: 14437 [2022-01-18 14:49:51,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:49:51,312 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 354 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:51,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 395 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:49:51,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14437 states. [2022-01-18 14:49:51,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14437 to 8864. [2022-01-18 14:49:51,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8864 states, 8863 states have (on average 4.0412952724811015) internal successors, (35818), 8863 states have internal predecessors, (35818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:51,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8864 states to 8864 states and 35818 transitions. [2022-01-18 14:49:51,602 INFO L78 Accepts]: Start accepts. Automaton has 8864 states and 35818 transitions. Word has length 28 [2022-01-18 14:49:51,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:51,602 INFO L470 AbstractCegarLoop]: Abstraction has 8864 states and 35818 transitions. [2022-01-18 14:49:51,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:51,602 INFO L276 IsEmpty]: Start isEmpty. Operand 8864 states and 35818 transitions. [2022-01-18 14:49:51,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:49:51,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:51,617 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:51,633 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 14:49:51,817 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,SelfDestructingSolverStorable27 [2022-01-18 14:49:51,818 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 14:49:51,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:51,818 INFO L85 PathProgramCache]: Analyzing trace with hash 565868706, now seen corresponding path program 18 times [2022-01-18 14:49:51,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:51,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597715137] [2022-01-18 14:49:51,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:51,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:51,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:51,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:51,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:51,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597715137] [2022-01-18 14:49:51,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597715137] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:49:51,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079159951] [2022-01-18 14:49:51,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:49:51,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:51,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:51,868 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 14:49:51,870 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 14:49:51,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:49:51,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:49:51,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:49:51,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:49:51,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:51,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:49:52,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:52,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079159951] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:49:52,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:49:52,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 9 [2022-01-18 14:49:52,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318168557] [2022-01-18 14:49:52,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:49:52,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:49:52,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:52,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:49:52,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:49:52,009 INFO L87 Difference]: Start difference. First operand 8864 states and 35818 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:52,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:52,663 INFO L93 Difference]: Finished difference Result 17059 states and 67264 transitions. [2022-01-18 14:49:52,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 14:49:52,664 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 14:49:52,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:52,711 INFO L225 Difference]: With dead ends: 17059 [2022-01-18 14:49:52,711 INFO L226 Difference]: Without dead ends: 17059 [2022-01-18 14:49:52,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:49:52,712 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 434 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:52,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 614 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:49:52,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17059 states. [2022-01-18 14:49:52,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17059 to 8917. [2022-01-18 14:49:52,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8917 states, 8916 states have (on average 4.040489008524002) internal successors, (36025), 8916 states have internal predecessors, (36025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:52,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8917 states to 8917 states and 36025 transitions. [2022-01-18 14:49:52,939 INFO L78 Accepts]: Start accepts. Automaton has 8917 states and 36025 transitions. Word has length 28 [2022-01-18 14:49:52,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:52,939 INFO L470 AbstractCegarLoop]: Abstraction has 8917 states and 36025 transitions. [2022-01-18 14:49:52,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:52,939 INFO L276 IsEmpty]: Start isEmpty. Operand 8917 states and 36025 transitions. [2022-01-18 14:49:52,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:49:52,954 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:52,954 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:52,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-01-18 14:49:53,155 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,SelfDestructingSolverStorable28 [2022-01-18 14:49:53,155 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 14:49:53,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:53,155 INFO L85 PathProgramCache]: Analyzing trace with hash 926053913, now seen corresponding path program 19 times [2022-01-18 14:49:53,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:53,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957719120] [2022-01-18 14:49:53,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:53,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:53,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:53,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:53,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:53,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957719120] [2022-01-18 14:49:53,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957719120] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:49:53,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078611363] [2022-01-18 14:49:53,185 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:49:53,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:53,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:53,186 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 14:49:53,187 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 14:49:53,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:53,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:49:53,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:49:53,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:53,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:49:53,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:53,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078611363] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:49:53,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:49:53,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 9 [2022-01-18 14:49:53,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173494316] [2022-01-18 14:49:53,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:49:53,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:49:53,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:53,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:49:53,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:49:53,312 INFO L87 Difference]: Start difference. First operand 8917 states and 36025 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:53,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:53,804 INFO L93 Difference]: Finished difference Result 17336 states and 65142 transitions. [2022-01-18 14:49:53,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 14:49:53,804 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 14:49:53,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:53,846 INFO L225 Difference]: With dead ends: 17336 [2022-01-18 14:49:53,846 INFO L226 Difference]: Without dead ends: 17224 [2022-01-18 14:49:53,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2022-01-18 14:49:53,847 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 470 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:53,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 449 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:49:53,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17224 states. [2022-01-18 14:49:54,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17224 to 8917. [2022-01-18 14:49:54,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8917 states, 8916 states have (on average 4.039367429340511) internal successors, (36015), 8916 states have internal predecessors, (36015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:54,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8917 states to 8917 states and 36015 transitions. [2022-01-18 14:49:54,120 INFO L78 Accepts]: Start accepts. Automaton has 8917 states and 36015 transitions. Word has length 28 [2022-01-18 14:49:54,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:54,120 INFO L470 AbstractCegarLoop]: Abstraction has 8917 states and 36015 transitions. [2022-01-18 14:49:54,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:54,120 INFO L276 IsEmpty]: Start isEmpty. Operand 8917 states and 36015 transitions. [2022-01-18 14:49:54,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:49:54,135 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:54,135 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:54,150 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 14:49:54,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:54,335 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 14:49:54,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:54,336 INFO L85 PathProgramCache]: Analyzing trace with hash 159994808, now seen corresponding path program 20 times [2022-01-18 14:49:54,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:54,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119496184] [2022-01-18 14:49:54,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:54,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:54,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:54,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:54,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:54,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119496184] [2022-01-18 14:49:54,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119496184] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:49:54,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799928411] [2022-01-18 14:49:54,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:49:54,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:54,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:54,370 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 14:49:54,371 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 14:49:54,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:49:54,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:49:54,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:49:54,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:49:54,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:54,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:49:54,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:54,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799928411] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:49:54,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:49:54,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-01-18 14:49:54,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120485801] [2022-01-18 14:49:54,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:49:54,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:49:54,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:54,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:49:54,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:49:54,495 INFO L87 Difference]: Start difference. First operand 8917 states and 36015 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:55,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:55,229 INFO L93 Difference]: Finished difference Result 13676 states and 54158 transitions. [2022-01-18 14:49:55,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 14:49:55,229 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 14:49:55,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:55,264 INFO L225 Difference]: With dead ends: 13676 [2022-01-18 14:49:55,264 INFO L226 Difference]: Without dead ends: 13676 [2022-01-18 14:49:55,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 14:49:55,265 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 319 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:55,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 729 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:49:55,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13676 states. [2022-01-18 14:49:55,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13676 to 9131. [2022-01-18 14:49:55,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9131 states, 9130 states have (on average 4.022562979189485) internal successors, (36726), 9130 states have internal predecessors, (36726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:55,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9131 states to 9131 states and 36726 transitions. [2022-01-18 14:49:55,493 INFO L78 Accepts]: Start accepts. Automaton has 9131 states and 36726 transitions. Word has length 28 [2022-01-18 14:49:55,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:55,493 INFO L470 AbstractCegarLoop]: Abstraction has 9131 states and 36726 transitions. [2022-01-18 14:49:55,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:55,493 INFO L276 IsEmpty]: Start isEmpty. Operand 9131 states and 36726 transitions. [2022-01-18 14:49:55,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:49:55,508 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:55,508 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:55,524 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 14:49:55,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:55,723 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 14:49:55,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:55,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1451531985, now seen corresponding path program 21 times [2022-01-18 14:49:55,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:55,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032326412] [2022-01-18 14:49:55,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:55,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:55,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:55,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:55,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:55,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032326412] [2022-01-18 14:49:55,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032326412] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:49:55,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587485646] [2022-01-18 14:49:55,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:49:55,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:55,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:55,759 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 14:49:55,760 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 14:49:55,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:49:55,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:49:55,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:49:55,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:49:55,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:55,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:49:55,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:55,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587485646] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:49:55,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:49:55,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-01-18 14:49:55,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250981773] [2022-01-18 14:49:55,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:49:55,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:49:55,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:55,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:49:55,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:49:55,894 INFO L87 Difference]: Start difference. First operand 9131 states and 36726 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:56,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:56,402 INFO L93 Difference]: Finished difference Result 15155 states and 56901 transitions. [2022-01-18 14:49:56,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 14:49:56,402 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 14:49:56,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:56,439 INFO L225 Difference]: With dead ends: 15155 [2022-01-18 14:49:56,439 INFO L226 Difference]: Without dead ends: 15043 [2022-01-18 14:49:56,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2022-01-18 14:49:56,439 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 398 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:56,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 474 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:49:56,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15043 states. [2022-01-18 14:49:56,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15043 to 9347. [2022-01-18 14:49:56,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9347 states, 9346 states have (on average 4.008238818745988) internal successors, (37461), 9346 states have internal predecessors, (37461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:56,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9347 states to 9347 states and 37461 transitions. [2022-01-18 14:49:56,702 INFO L78 Accepts]: Start accepts. Automaton has 9347 states and 37461 transitions. Word has length 28 [2022-01-18 14:49:56,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:56,702 INFO L470 AbstractCegarLoop]: Abstraction has 9347 states and 37461 transitions. [2022-01-18 14:49:56,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:56,703 INFO L276 IsEmpty]: Start isEmpty. Operand 9347 states and 37461 transitions. [2022-01-18 14:49:56,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:49:56,718 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:56,718 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:56,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-01-18 14:49:56,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:56,918 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 14:49:56,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:56,919 INFO L85 PathProgramCache]: Analyzing trace with hash -772972101, now seen corresponding path program 22 times [2022-01-18 14:49:56,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:56,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359529480] [2022-01-18 14:49:56,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:56,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:56,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:56,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:56,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:56,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359529480] [2022-01-18 14:49:56,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359529480] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:49:56,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142155841] [2022-01-18 14:49:56,942 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:49:56,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:56,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:56,943 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 14:49:56,956 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 14:49:56,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:49:56,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:49:56,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:49:56,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:49:57,059 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 14:49:57,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:49:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:57,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142155841] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:49:57,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:49:57,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-01-18 14:49:57,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792122147] [2022-01-18 14:49:57,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:49:57,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:49:57,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:57,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:49:57,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:49:57,117 INFO L87 Difference]: Start difference. First operand 9347 states and 37461 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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 14:49:57,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:57,808 INFO L93 Difference]: Finished difference Result 16354 states and 63144 transitions. [2022-01-18 14:49:57,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 14:49:57,808 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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 28 [2022-01-18 14:49:57,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:57,849 INFO L225 Difference]: With dead ends: 16354 [2022-01-18 14:49:57,849 INFO L226 Difference]: Without dead ends: 16354 [2022-01-18 14:49:57,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2022-01-18 14:49:57,850 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 374 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:57,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 625 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:49:57,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16354 states. [2022-01-18 14:49:58,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16354 to 9241. [2022-01-18 14:49:58,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9241 states, 9240 states have (on average 3.997943722943723) internal successors, (36941), 9240 states have internal predecessors, (36941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:58,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9241 states to 9241 states and 36941 transitions. [2022-01-18 14:49:58,061 INFO L78 Accepts]: Start accepts. Automaton has 9241 states and 36941 transitions. Word has length 28 [2022-01-18 14:49:58,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:58,061 INFO L470 AbstractCegarLoop]: Abstraction has 9241 states and 36941 transitions. [2022-01-18 14:49:58,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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 14:49:58,062 INFO L276 IsEmpty]: Start isEmpty. Operand 9241 states and 36941 transitions. [2022-01-18 14:49:58,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:49:58,077 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:58,077 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:58,092 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 14:49:58,277 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,SelfDestructingSolverStorable32 [2022-01-18 14:49:58,277 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 14:49:58,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:58,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1482563436, now seen corresponding path program 23 times [2022-01-18 14:49:58,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:58,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813996594] [2022-01-18 14:49:58,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:58,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:58,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:58,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:58,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:58,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813996594] [2022-01-18 14:49:58,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813996594] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:49:58,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138851991] [2022-01-18 14:49:58,304 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:49:58,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:58,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:58,305 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 14:49:58,305 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 14:49:58,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:49:58,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:49:58,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:49:58,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:49:58,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:58,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:49:58,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:58,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138851991] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:49:58,435 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:49:58,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-01-18 14:49:58,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608980977] [2022-01-18 14:49:58,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:49:58,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:49:58,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:58,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:49:58,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:49:58,435 INFO L87 Difference]: Start difference. First operand 9241 states and 36941 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:58,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:58,871 INFO L93 Difference]: Finished difference Result 12762 states and 48779 transitions. [2022-01-18 14:49:58,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 14:49:58,872 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 14:49:58,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:58,904 INFO L225 Difference]: With dead ends: 12762 [2022-01-18 14:49:58,904 INFO L226 Difference]: Without dead ends: 12722 [2022-01-18 14:49:58,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:49:58,905 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 363 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:58,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 450 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:49:58,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12722 states. [2022-01-18 14:49:59,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12722 to 8983. [2022-01-18 14:49:59,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8983 states, 8982 states have (on average 4.0035626809173905) internal successors, (35960), 8982 states have internal predecessors, (35960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:59,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8983 states to 8983 states and 35960 transitions. [2022-01-18 14:49:59,154 INFO L78 Accepts]: Start accepts. Automaton has 8983 states and 35960 transitions. Word has length 28 [2022-01-18 14:49:59,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:59,154 INFO L470 AbstractCegarLoop]: Abstraction has 8983 states and 35960 transitions. [2022-01-18 14:49:59,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:59,154 INFO L276 IsEmpty]: Start isEmpty. Operand 8983 states and 35960 transitions. [2022-01-18 14:49:59,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:49:59,170 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:59,170 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:59,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 14:49:59,371 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,SelfDestructingSolverStorable33 [2022-01-18 14:49:59,371 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 14:49:59,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:59,371 INFO L85 PathProgramCache]: Analyzing trace with hash -883655600, now seen corresponding path program 4 times [2022-01-18 14:49:59,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:59,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024432192] [2022-01-18 14:49:59,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:59,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:59,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:59,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:59,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:59,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024432192] [2022-01-18 14:49:59,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024432192] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:49:59,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765178370] [2022-01-18 14:49:59,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:49:59,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:59,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:59,405 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 14:49:59,406 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 14:49:59,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:49:59,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:49:59,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:49:59,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:49:59,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:59,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:49:59,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:59,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765178370] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:49:59,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:49:59,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 14:49:59,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290484253] [2022-01-18 14:49:59,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:49:59,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:49:59,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:59,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:49:59,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:49:59,541 INFO L87 Difference]: Start difference. First operand 8983 states and 35960 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 14:50:00,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:50:00,370 INFO L93 Difference]: Finished difference Result 30696 states and 121806 transitions. [2022-01-18 14:50:00,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 14:50:00,371 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 28 [2022-01-18 14:50:00,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:50:00,461 INFO L225 Difference]: With dead ends: 30696 [2022-01-18 14:50:00,461 INFO L226 Difference]: Without dead ends: 30696 [2022-01-18 14:50:00,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=1056, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 14:50:00,462 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 413 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:50:00,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 766 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:50:00,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30696 states. [2022-01-18 14:50:00,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30696 to 14412. [2022-01-18 14:50:00,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14412 states, 14411 states have (on average 4.099715495107904) internal successors, (59081), 14411 states have internal predecessors, (59081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:50:00,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14412 states to 14412 states and 59081 transitions. [2022-01-18 14:50:00,851 INFO L78 Accepts]: Start accepts. Automaton has 14412 states and 59081 transitions. Word has length 28 [2022-01-18 14:50:00,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:50:00,851 INFO L470 AbstractCegarLoop]: Abstraction has 14412 states and 59081 transitions. [2022-01-18 14:50:00,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 14:50:00,851 INFO L276 IsEmpty]: Start isEmpty. Operand 14412 states and 59081 transitions. [2022-01-18 14:50:00,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:50:00,879 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:50:00,879 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:50:00,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-01-18 14:50:01,080 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,SelfDestructingSolverStorable34 [2022-01-18 14:50:01,080 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 14:50:01,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:50:01,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1256946325, now seen corresponding path program 5 times [2022-01-18 14:50:01,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:50:01,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992193766] [2022-01-18 14:50:01,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:50:01,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:50:01,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:50:01,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:01,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:50:01,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992193766] [2022-01-18 14:50:01,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992193766] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:50:01,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686414529] [2022-01-18 14:50:01,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:50:01,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:50:01,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:50:01,111 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 14:50:01,112 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 14:50:01,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:50:01,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:50:01,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:50:01,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:50:01,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:01,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:50:01,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:01,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686414529] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:50:01,259 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:50:01,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 14:50:01,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446072580] [2022-01-18 14:50:01,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:50:01,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:50:01,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:50:01,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:50:01,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:50:01,260 INFO L87 Difference]: Start difference. First operand 14412 states and 59081 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 14:50:02,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:50:02,198 INFO L93 Difference]: Finished difference Result 42800 states and 170574 transitions. [2022-01-18 14:50:02,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 14:50:02,198 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 28 [2022-01-18 14:50:02,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:50:02,356 INFO L225 Difference]: With dead ends: 42800 [2022-01-18 14:50:02,356 INFO L226 Difference]: Without dead ends: 42559 [2022-01-18 14:50:02,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=243, Invalid=947, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 14:50:02,357 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 441 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:50:02,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 608 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:50:02,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42559 states. [2022-01-18 14:50:03,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42559 to 25911. [2022-01-18 14:50:03,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25911 states, 25910 states have (on average 4.2748745658047085) internal successors, (110762), 25910 states have internal predecessors, (110762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:50:03,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25911 states to 25911 states and 110762 transitions. [2022-01-18 14:50:03,136 INFO L78 Accepts]: Start accepts. Automaton has 25911 states and 110762 transitions. Word has length 28 [2022-01-18 14:50:03,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:50:03,136 INFO L470 AbstractCegarLoop]: Abstraction has 25911 states and 110762 transitions. [2022-01-18 14:50:03,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 14:50:03,136 INFO L276 IsEmpty]: Start isEmpty. Operand 25911 states and 110762 transitions. [2022-01-18 14:50:03,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:50:03,192 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:50:03,192 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:50:03,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-01-18 14:50:03,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:50:03,395 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 14:50:03,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:50:03,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1678023439, now seen corresponding path program 6 times [2022-01-18 14:50:03,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:50:03,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134722405] [2022-01-18 14:50:03,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:50:03,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:50:03,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:50:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:03,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:50:03,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134722405] [2022-01-18 14:50:03,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134722405] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:50:03,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129691445] [2022-01-18 14:50:03,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:50:03,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:50:03,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:50:03,421 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 14:50:03,421 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 14:50:03,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:50:03,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:50:03,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:50:03,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:50:03,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:03,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:50:03,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:03,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129691445] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:50:03,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:50:03,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9 [2022-01-18 14:50:03,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258279902] [2022-01-18 14:50:03,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:50:03,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:50:03,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:50:03,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:50:03,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:50:03,549 INFO L87 Difference]: Start difference. First operand 25911 states and 110762 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 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 14:50:04,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:50:04,489 INFO L93 Difference]: Finished difference Result 47437 states and 189585 transitions. [2022-01-18 14:50:04,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 14:50:04,489 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 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 28 [2022-01-18 14:50:04,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:50:04,654 INFO L225 Difference]: With dead ends: 47437 [2022-01-18 14:50:04,654 INFO L226 Difference]: Without dead ends: 47437 [2022-01-18 14:50:04,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:50:04,655 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 454 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:50:04,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 386 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:50:04,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47437 states. [2022-01-18 14:50:05,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47437 to 25754. [2022-01-18 14:50:05,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25754 states, 25753 states have (on average 4.2497184794004585) internal successors, (109443), 25753 states have internal predecessors, (109443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:50:05,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25754 states to 25754 states and 109443 transitions. [2022-01-18 14:50:05,613 INFO L78 Accepts]: Start accepts. Automaton has 25754 states and 109443 transitions. Word has length 28 [2022-01-18 14:50:05,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:50:05,613 INFO L470 AbstractCegarLoop]: Abstraction has 25754 states and 109443 transitions. [2022-01-18 14:50:05,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 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 14:50:05,614 INFO L276 IsEmpty]: Start isEmpty. Operand 25754 states and 109443 transitions. [2022-01-18 14:50:05,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:50:05,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:50:05,673 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:50:05,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-18 14:50:05,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-18 14:50:05,875 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 14:50:05,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:50:05,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1011565522, now seen corresponding path program 7 times [2022-01-18 14:50:05,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:50:05,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800961363] [2022-01-18 14:50:05,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:50:05,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:50:05,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:50:05,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:05,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:50:05,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800961363] [2022-01-18 14:50:05,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800961363] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:50:05,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903929065] [2022-01-18 14:50:05,901 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:50:05,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:50:05,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:50:05,902 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 14:50:05,903 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 14:50:05,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:50:05,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:50:05,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:50:05,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:05,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:50:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:06,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903929065] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:50:06,041 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:50:06,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9 [2022-01-18 14:50:06,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290820155] [2022-01-18 14:50:06,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:50:06,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:50:06,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:50:06,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:50:06,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:50:06,042 INFO L87 Difference]: Start difference. First operand 25754 states and 109443 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 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 14:50:06,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:50:06,726 INFO L93 Difference]: Finished difference Result 31353 states and 128475 transitions. [2022-01-18 14:50:06,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 14:50:06,726 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 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 28 [2022-01-18 14:50:06,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:50:06,830 INFO L225 Difference]: With dead ends: 31353 [2022-01-18 14:50:06,830 INFO L226 Difference]: Without dead ends: 31305 [2022-01-18 14:50:06,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:50:06,830 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 213 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:50:06,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 525 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:50:07,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31305 states. [2022-01-18 14:50:07,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31305 to 25920. [2022-01-18 14:50:07,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25920 states, 25919 states have (on average 4.244916856360199) internal successors, (110024), 25919 states have internal predecessors, (110024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:50:07,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25920 states to 25920 states and 110024 transitions. [2022-01-18 14:50:07,777 INFO L78 Accepts]: Start accepts. Automaton has 25920 states and 110024 transitions. Word has length 28 [2022-01-18 14:50:07,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:50:07,777 INFO L470 AbstractCegarLoop]: Abstraction has 25920 states and 110024 transitions. [2022-01-18 14:50:07,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 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 14:50:07,777 INFO L276 IsEmpty]: Start isEmpty. Operand 25920 states and 110024 transitions. [2022-01-18 14:50:07,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:50:07,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:50:07,836 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:50:07,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-01-18 14:50:08,037 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,SelfDestructingSolverStorable37 [2022-01-18 14:50:08,037 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 14:50:08,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:50:08,037 INFO L85 PathProgramCache]: Analyzing trace with hash -839730284, now seen corresponding path program 8 times [2022-01-18 14:50:08,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:50:08,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813532250] [2022-01-18 14:50:08,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:50:08,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:50:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:50:08,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:08,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:50:08,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813532250] [2022-01-18 14:50:08,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813532250] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:50:08,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089133567] [2022-01-18 14:50:08,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:50:08,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:50:08,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:50:08,065 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 14:50:08,066 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 14:50:08,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:50:08,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:50:08,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:50:08,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:50:08,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:08,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:50:08,213 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 14:50:08,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089133567] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:50:08,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:50:08,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 10 [2022-01-18 14:50:08,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662456798] [2022-01-18 14:50:08,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:50:08,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:50:08,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:50:08,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:50:08,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:50:08,214 INFO L87 Difference]: Start difference. First operand 25920 states and 110024 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 14:50:09,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:50:09,204 INFO L93 Difference]: Finished difference Result 68541 states and 278478 transitions. [2022-01-18 14:50:09,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 14:50:09,205 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 28 [2022-01-18 14:50:09,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:50:09,484 INFO L225 Difference]: With dead ends: 68541 [2022-01-18 14:50:09,485 INFO L226 Difference]: Without dead ends: 68541 [2022-01-18 14:50:09,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2022-01-18 14:50:09,485 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 439 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:50:09,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 394 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:50:09,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68541 states. [2022-01-18 14:50:10,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68541 to 33948. [2022-01-18 14:50:10,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33948 states, 33947 states have (on average 4.294783044157068) internal successors, (145795), 33947 states have internal predecessors, (145795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:50:10,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33948 states to 33948 states and 145795 transitions. [2022-01-18 14:50:10,992 INFO L78 Accepts]: Start accepts. Automaton has 33948 states and 145795 transitions. Word has length 28 [2022-01-18 14:50:10,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:50:10,992 INFO L470 AbstractCegarLoop]: Abstraction has 33948 states and 145795 transitions. [2022-01-18 14:50:10,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 14:50:10,992 INFO L276 IsEmpty]: Start isEmpty. Operand 33948 states and 145795 transitions. [2022-01-18 14:50:11,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:50:11,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:50:11,068 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:50:11,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-18 14:50:11,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-18 14:50:11,268 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 14:50:11,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:50:11,269 INFO L85 PathProgramCache]: Analyzing trace with hash -71294673, now seen corresponding path program 9 times [2022-01-18 14:50:11,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:50:11,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074889500] [2022-01-18 14:50:11,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:50:11,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:50:11,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:50:11,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:11,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:50:11,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074889500] [2022-01-18 14:50:11,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074889500] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:50:11,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623937196] [2022-01-18 14:50:11,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:50:11,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:50:11,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:50:11,306 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 14:50:11,307 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 14:50:11,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 14:50:11,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:50:11,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:50:11,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:50:11,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:11,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:50:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:50:11,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623937196] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:50:11,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:50:11,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 10 [2022-01-18 14:50:11,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085887018] [2022-01-18 14:50:11,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:50:11,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:50:11,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:50:11,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:50:11,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:50:11,442 INFO L87 Difference]: Start difference. First operand 33948 states and 145795 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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 14:50:12,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:50:12,307 INFO L93 Difference]: Finished difference Result 55162 states and 224042 transitions. [2022-01-18 14:50:12,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 14:50:12,308 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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 28 [2022-01-18 14:50:12,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:50:12,505 INFO L225 Difference]: With dead ends: 55162 [2022-01-18 14:50:12,506 INFO L226 Difference]: Without dead ends: 55087 [2022-01-18 14:50:12,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2022-01-18 14:50:12,506 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 411 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:50:12,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 504 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:50:12,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55087 states. [2022-01-18 14:50:13,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55087 to 33948. [2022-01-18 14:50:13,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33948 states, 33947 states have (on average 4.294076059740183) internal successors, (145771), 33947 states have internal predecessors, (145771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:50:13,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33948 states to 33948 states and 145771 transitions. [2022-01-18 14:50:13,716 INFO L78 Accepts]: Start accepts. Automaton has 33948 states and 145771 transitions. Word has length 28 [2022-01-18 14:50:13,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:50:13,716 INFO L470 AbstractCegarLoop]: Abstraction has 33948 states and 145771 transitions. [2022-01-18 14:50:13,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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 14:50:13,716 INFO L276 IsEmpty]: Start isEmpty. Operand 33948 states and 145771 transitions. [2022-01-18 14:50:13,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:50:13,788 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:50:13,788 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:50:13,805 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 14:50:13,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-18 14:50:13,989 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 14:50:13,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:50:13,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1536799755, now seen corresponding path program 10 times [2022-01-18 14:50:13,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:50:13,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114412933] [2022-01-18 14:50:13,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:50:13,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:50:13,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:50:14,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:14,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:50:14,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114412933] [2022-01-18 14:50:14,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114412933] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:50:14,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585946040] [2022-01-18 14:50:14,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:50:14,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:50:14,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:50:14,035 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 14:50:14,036 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 14:50:14,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:50:14,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:50:14,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:50:14,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:50:14,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:14,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:50:14,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:14,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585946040] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:50:14,178 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:50:14,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 10 [2022-01-18 14:50:14,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135274012] [2022-01-18 14:50:14,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:50:14,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:50:14,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:50:14,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:50:14,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:50:14,179 INFO L87 Difference]: Start difference. First operand 33948 states and 145771 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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 14:50:15,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:50:15,197 INFO L93 Difference]: Finished difference Result 64841 states and 263328 transitions. [2022-01-18 14:50:15,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 14:50:15,198 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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 28 [2022-01-18 14:50:15,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:50:15,417 INFO L225 Difference]: With dead ends: 64841 [2022-01-18 14:50:15,417 INFO L226 Difference]: Without dead ends: 64841 [2022-01-18 14:50:15,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2022-01-18 14:50:15,418 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 452 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:50:15,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 484 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:50:15,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64841 states. [2022-01-18 14:50:16,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64841 to 34786. [2022-01-18 14:50:16,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34786 states, 34785 states have (on average 4.2928273681184415) internal successors, (149326), 34785 states have internal predecessors, (149326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:50:17,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34786 states to 34786 states and 149326 transitions. [2022-01-18 14:50:17,047 INFO L78 Accepts]: Start accepts. Automaton has 34786 states and 149326 transitions. Word has length 28 [2022-01-18 14:50:17,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:50:17,047 INFO L470 AbstractCegarLoop]: Abstraction has 34786 states and 149326 transitions. [2022-01-18 14:50:17,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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 14:50:17,047 INFO L276 IsEmpty]: Start isEmpty. Operand 34786 states and 149326 transitions. [2022-01-18 14:50:17,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:50:17,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:50:17,137 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:50:17,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-01-18 14:50:17,338 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,SelfDestructingSolverStorable40 [2022-01-18 14:50:17,338 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 14:50:17,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:50:17,338 INFO L85 PathProgramCache]: Analyzing trace with hash 808212756, now seen corresponding path program 11 times [2022-01-18 14:50:17,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:50:17,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716328512] [2022-01-18 14:50:17,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:50:17,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:50:17,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:50:17,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:17,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:50:17,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716328512] [2022-01-18 14:50:17,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716328512] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:50:17,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048059326] [2022-01-18 14:50:17,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:50:17,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:50:17,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:50:17,365 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 14:50:17,365 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 14:50:17,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:50:17,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:50:17,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:50:17,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:50:17,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:17,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:50:17,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:17,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048059326] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:50:17,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:50:17,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 10 [2022-01-18 14:50:17,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37658521] [2022-01-18 14:50:17,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:50:17,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:50:17,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:50:17,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:50:17,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:50:17,510 INFO L87 Difference]: Start difference. First operand 34786 states and 149326 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:50:18,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:50:18,393 INFO L93 Difference]: Finished difference Result 52787 states and 215305 transitions. [2022-01-18 14:50:18,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 14:50:18,394 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 14:50:18,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:50:18,576 INFO L225 Difference]: With dead ends: 52787 [2022-01-18 14:50:18,576 INFO L226 Difference]: Without dead ends: 52739 [2022-01-18 14:50:18,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2022-01-18 14:50:18,577 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 420 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:50:18,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 451 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:50:18,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52739 states. [2022-01-18 14:50:19,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52739 to 34788. [2022-01-18 14:50:19,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34788 states, 34787 states have (on average 4.292206858884066) internal successors, (149313), 34787 states have internal predecessors, (149313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:50:19,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34788 states to 34788 states and 149313 transitions. [2022-01-18 14:50:19,818 INFO L78 Accepts]: Start accepts. Automaton has 34788 states and 149313 transitions. Word has length 28 [2022-01-18 14:50:19,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:50:19,818 INFO L470 AbstractCegarLoop]: Abstraction has 34788 states and 149313 transitions. [2022-01-18 14:50:19,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:50:19,818 INFO L276 IsEmpty]: Start isEmpty. Operand 34788 states and 149313 transitions. [2022-01-18 14:50:19,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:50:19,891 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:50:19,891 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:50:19,906 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 14:50:20,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:50:20,091 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 14:50:20,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:50:20,092 INFO L85 PathProgramCache]: Analyzing trace with hash 389234323, now seen corresponding path program 12 times [2022-01-18 14:50:20,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:50:20,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900572529] [2022-01-18 14:50:20,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:50:20,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:50:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:50:20,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:20,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:50:20,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900572529] [2022-01-18 14:50:20,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900572529] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:50:20,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601552689] [2022-01-18 14:50:20,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:50:20,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:50:20,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:50:20,128 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 14:50:20,129 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 14:50:20,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:50:20,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:50:20,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:50:20,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:50:20,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:20,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:50:20,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:20,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601552689] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:50:20,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:50:20,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11 [2022-01-18 14:50:20,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638184753] [2022-01-18 14:50:20,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:50:20,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:50:20,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:50:20,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:50:20,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:50:20,297 INFO L87 Difference]: Start difference. First operand 34788 states and 149313 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 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 14:50:21,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:50:21,502 INFO L93 Difference]: Finished difference Result 65944 states and 267103 transitions. [2022-01-18 14:50:21,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 14:50:21,503 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 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 28 [2022-01-18 14:50:21,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:50:21,800 INFO L225 Difference]: With dead ends: 65944 [2022-01-18 14:50:21,801 INFO L226 Difference]: Without dead ends: 65944 [2022-01-18 14:50:21,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 14:50:21,801 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 504 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:50:21,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 536 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:50:21,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65944 states. [2022-01-18 14:50:23,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65944 to 34898. [2022-01-18 14:50:23,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34898 states, 34897 states have (on average 4.264378026764478) internal successors, (148814), 34897 states have internal predecessors, (148814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:50:23,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34898 states to 34898 states and 148814 transitions. [2022-01-18 14:50:23,197 INFO L78 Accepts]: Start accepts. Automaton has 34898 states and 148814 transitions. Word has length 28 [2022-01-18 14:50:23,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:50:23,197 INFO L470 AbstractCegarLoop]: Abstraction has 34898 states and 148814 transitions. [2022-01-18 14:50:23,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 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 14:50:23,197 INFO L276 IsEmpty]: Start isEmpty. Operand 34898 states and 148814 transitions. [2022-01-18 14:50:23,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:50:23,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:50:23,269 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:50:23,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-18 14:50:23,470 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,SelfDestructingSolverStorable42 [2022-01-18 14:50:23,470 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 14:50:23,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:50:23,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1741470504, now seen corresponding path program 13 times [2022-01-18 14:50:23,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:50:23,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356784818] [2022-01-18 14:50:23,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:50:23,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:50:23,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:50:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:23,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:50:23,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356784818] [2022-01-18 14:50:23,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356784818] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:50:23,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754834386] [2022-01-18 14:50:23,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:50:23,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:50:23,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:50:23,502 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 14:50:23,502 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 14:50:23,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:50:23,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:50:23,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:50:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:23,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:50:23,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:23,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754834386] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:50:23,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:50:23,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11 [2022-01-18 14:50:23,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392175495] [2022-01-18 14:50:23,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:50:23,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:50:23,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:50:23,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:50:23,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:50:23,644 INFO L87 Difference]: Start difference. First operand 34898 states and 148814 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:50:24,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:50:24,558 INFO L93 Difference]: Finished difference Result 46707 states and 190026 transitions. [2022-01-18 14:50:24,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 14:50:24,558 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 14:50:24,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:50:24,712 INFO L225 Difference]: With dead ends: 46707 [2022-01-18 14:50:24,712 INFO L226 Difference]: Without dead ends: 46659 [2022-01-18 14:50:24,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2022-01-18 14:50:24,713 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 411 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:50:24,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 505 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:50:24,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46659 states. [2022-01-18 14:50:25,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46659 to 35216. [2022-01-18 14:50:25,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35216 states, 35215 states have (on average 4.257532301576033) internal successors, (149929), 35215 states have internal predecessors, (149929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:50:25,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35216 states to 35216 states and 149929 transitions. [2022-01-18 14:50:25,771 INFO L78 Accepts]: Start accepts. Automaton has 35216 states and 149929 transitions. Word has length 28 [2022-01-18 14:50:25,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:50:25,771 INFO L470 AbstractCegarLoop]: Abstraction has 35216 states and 149929 transitions. [2022-01-18 14:50:25,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:50:25,771 INFO L276 IsEmpty]: Start isEmpty. Operand 35216 states and 149929 transitions. [2022-01-18 14:50:25,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:50:25,845 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:50:25,845 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:50:25,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-18 14:50:26,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:50:26,051 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 14:50:26,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:50:26,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1733254908, now seen corresponding path program 14 times [2022-01-18 14:50:26,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:50:26,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393158473] [2022-01-18 14:50:26,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:50:26,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:50:26,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:50:26,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:26,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:50:26,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393158473] [2022-01-18 14:50:26,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393158473] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:50:26,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981796611] [2022-01-18 14:50:26,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:50:26,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:50:26,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:50:26,077 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 14:50:26,077 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 14:50:26,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:50:26,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:50:26,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:50:26,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:50:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:26,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:50:26,452 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 14:50:26,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981796611] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:50:26,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:50:26,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9 [2022-01-18 14:50:26,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454140302] [2022-01-18 14:50:26,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:50:26,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:50:26,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:50:26,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:50:26,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:50:26,453 INFO L87 Difference]: Start difference. First operand 35216 states and 149929 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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 14:50:27,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:50:27,239 INFO L93 Difference]: Finished difference Result 60164 states and 241689 transitions. [2022-01-18 14:50:27,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 14:50:27,239 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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 28 [2022-01-18 14:50:27,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:50:27,507 INFO L225 Difference]: With dead ends: 60164 [2022-01-18 14:50:27,507 INFO L226 Difference]: Without dead ends: 60164 [2022-01-18 14:50:27,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:50:27,508 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 532 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:50:27,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 322 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:50:27,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60164 states. [2022-01-18 14:50:28,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60164 to 35216. [2022-01-18 14:50:28,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35216 states, 35215 states have (on average 4.2527048132897916) internal successors, (149759), 35215 states have internal predecessors, (149759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:50:29,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35216 states to 35216 states and 149759 transitions. [2022-01-18 14:50:29,127 INFO L78 Accepts]: Start accepts. Automaton has 35216 states and 149759 transitions. Word has length 28 [2022-01-18 14:50:29,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:50:29,127 INFO L470 AbstractCegarLoop]: Abstraction has 35216 states and 149759 transitions. [2022-01-18 14:50:29,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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 14:50:29,127 INFO L276 IsEmpty]: Start isEmpty. Operand 35216 states and 149759 transitions. [2022-01-18 14:50:29,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:50:29,221 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:50:29,221 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:50:29,238 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 14:50:29,421 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,SelfDestructingSolverStorable44 [2022-01-18 14:50:29,422 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 14:50:29,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:50:29,423 INFO L85 PathProgramCache]: Analyzing trace with hash -964819297, now seen corresponding path program 15 times [2022-01-18 14:50:29,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:50:29,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834967541] [2022-01-18 14:50:29,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:50:29,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:50:29,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:50:29,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:29,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:50:29,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834967541] [2022-01-18 14:50:29,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834967541] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:50:29,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165638290] [2022-01-18 14:50:29,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:50:29,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:50:29,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:50:29,451 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 14:50:29,451 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 14:50:29,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 14:50:29,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:50:29,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:50:29,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:50:29,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:29,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:50:29,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:50:29,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165638290] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:50:29,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:50:29,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9 [2022-01-18 14:50:29,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265606807] [2022-01-18 14:50:29,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:50:29,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:50:29,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:50:29,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:50:29,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:50:29,592 INFO L87 Difference]: Start difference. First operand 35216 states and 149759 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 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 14:50:30,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:50:30,203 INFO L93 Difference]: Finished difference Result 42905 states and 176555 transitions. [2022-01-18 14:50:30,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 14:50:30,203 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 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 28 [2022-01-18 14:50:30,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:50:30,373 INFO L225 Difference]: With dead ends: 42905 [2022-01-18 14:50:30,373 INFO L226 Difference]: Without dead ends: 42880 [2022-01-18 14:50:30,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-01-18 14:50:30,374 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 190 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:50:30,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 627 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:50:30,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42880 states. [2022-01-18 14:50:31,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42880 to 35216. [2022-01-18 14:50:31,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35216 states, 35215 states have (on average 4.252364049410763) internal successors, (149747), 35215 states have internal predecessors, (149747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:50:31,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35216 states to 35216 states and 149747 transitions. [2022-01-18 14:50:31,443 INFO L78 Accepts]: Start accepts. Automaton has 35216 states and 149747 transitions. Word has length 28 [2022-01-18 14:50:31,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:50:31,444 INFO L470 AbstractCegarLoop]: Abstraction has 35216 states and 149747 transitions. [2022-01-18 14:50:31,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 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 14:50:31,444 INFO L276 IsEmpty]: Start isEmpty. Operand 35216 states and 149747 transitions. [2022-01-18 14:50:31,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:50:31,527 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:50:31,527 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:50:31,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-01-18 14:50:31,727 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,SelfDestructingSolverStorable45 [2022-01-18 14:50:31,727 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 14:50:31,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:50:31,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1864642917, now seen corresponding path program 16 times [2022-01-18 14:50:31,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:50:31,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332931017] [2022-01-18 14:50:31,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:50:31,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:50:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:50:31,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:31,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:50:31,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332931017] [2022-01-18 14:50:31,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332931017] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:50:31,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628922303] [2022-01-18 14:50:31,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:50:31,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:50:31,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:50:31,754 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 14:50:31,755 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 14:50:31,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:50:31,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:50:31,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:50:31,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:50:31,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:31,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:50:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:50:31,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628922303] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:50:31,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:50:31,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9 [2022-01-18 14:50:31,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969944582] [2022-01-18 14:50:31,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:50:31,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:50:31,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:50:31,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:50:31,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:50:31,887 INFO L87 Difference]: Start difference. First operand 35216 states and 149747 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:50:32,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:50:32,815 INFO L93 Difference]: Finished difference Result 48638 states and 199829 transitions. [2022-01-18 14:50:32,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 14:50:32,816 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 14:50:32,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:50:33,006 INFO L225 Difference]: With dead ends: 48638 [2022-01-18 14:50:33,006 INFO L226 Difference]: Without dead ends: 48638 [2022-01-18 14:50:33,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:50:33,007 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 285 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:50:33,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 533 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:50:33,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48638 states. [2022-01-18 14:50:33,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48638 to 35386. [2022-01-18 14:50:34,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35386 states, 35385 states have (on average 4.251292920729123) internal successors, (150432), 35385 states have internal predecessors, (150432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:50:34,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35386 states to 35386 states and 150432 transitions. [2022-01-18 14:50:34,157 INFO L78 Accepts]: Start accepts. Automaton has 35386 states and 150432 transitions. Word has length 28 [2022-01-18 14:50:34,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:50:34,157 INFO L470 AbstractCegarLoop]: Abstraction has 35386 states and 150432 transitions. [2022-01-18 14:50:34,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:50:34,157 INFO L276 IsEmpty]: Start isEmpty. Operand 35386 states and 150432 transitions. [2022-01-18 14:50:34,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:50:34,230 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:50:34,230 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:50:34,245 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 14:50:34,437 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,SelfDestructingSolverStorable46 [2022-01-18 14:50:34,437 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 14:50:34,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:50:34,438 INFO L85 PathProgramCache]: Analyzing trace with hash -85311868, now seen corresponding path program 17 times [2022-01-18 14:50:34,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:50:34,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98597634] [2022-01-18 14:50:34,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:50:34,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:50:34,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:50:34,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:34,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:50:34,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98597634] [2022-01-18 14:50:34,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98597634] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:50:34,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047010262] [2022-01-18 14:50:34,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:50:34,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:50:34,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:50:34,462 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 14:50:34,463 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 14:50:34,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:50:34,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:50:34,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:50:34,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:50:34,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:34,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:50:34,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:50:34,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047010262] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:50:34,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:50:34,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9 [2022-01-18 14:50:34,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434798691] [2022-01-18 14:50:34,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:50:34,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:50:34,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:50:34,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:50:34,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:50:34,589 INFO L87 Difference]: Start difference. First operand 35386 states and 150432 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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 14:50:35,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:50:35,629 INFO L93 Difference]: Finished difference Result 54151 states and 216784 transitions. [2022-01-18 14:50:35,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 14:50:35,630 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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 28 [2022-01-18 14:50:35,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:50:35,852 INFO L225 Difference]: With dead ends: 54151 [2022-01-18 14:50:35,852 INFO L226 Difference]: Without dead ends: 54127 [2022-01-18 14:50:35,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:50:35,852 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 467 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:50:35,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 412 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:50:35,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54127 states. [2022-01-18 14:50:36,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54127 to 35386. [2022-01-18 14:50:36,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35386 states, 35385 states have (on average 4.2509537939805) internal successors, (150420), 35385 states have internal predecessors, (150420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:50:37,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35386 states to 35386 states and 150420 transitions. [2022-01-18 14:50:37,048 INFO L78 Accepts]: Start accepts. Automaton has 35386 states and 150420 transitions. Word has length 28 [2022-01-18 14:50:37,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:50:37,048 INFO L470 AbstractCegarLoop]: Abstraction has 35386 states and 150420 transitions. [2022-01-18 14:50:37,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 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 14:50:37,048 INFO L276 IsEmpty]: Start isEmpty. Operand 35386 states and 150420 transitions. [2022-01-18 14:50:37,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:50:37,131 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:50:37,131 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:50:37,147 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 14:50:37,331 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,SelfDestructingSolverStorable47 [2022-01-18 14:50:37,332 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 14:50:37,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:50:37,332 INFO L85 PathProgramCache]: Analyzing trace with hash -504290301, now seen corresponding path program 18 times [2022-01-18 14:50:37,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:50:37,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587248189] [2022-01-18 14:50:37,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:50:37,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:50:37,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:50:37,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:37,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:50:37,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587248189] [2022-01-18 14:50:37,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587248189] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:50:37,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662304230] [2022-01-18 14:50:37,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:50:37,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:50:37,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:50:37,358 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 14:50:37,371 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 14:50:37,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:50:37,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:50:37,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:50:37,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:50:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:37,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:50:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:37,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662304230] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:50:37,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:50:37,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-01-18 14:50:37,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422939733] [2022-01-18 14:50:37,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:50:37,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:50:37,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:50:37,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:50:37,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:50:37,494 INFO L87 Difference]: Start difference. First operand 35386 states and 150420 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:50:38,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:50:38,922 INFO L93 Difference]: Finished difference Result 66871 states and 276078 transitions. [2022-01-18 14:50:38,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 14:50:38,922 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 14:50:38,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:50:39,229 INFO L225 Difference]: With dead ends: 66871 [2022-01-18 14:50:39,230 INFO L226 Difference]: Without dead ends: 66871 [2022-01-18 14:50:39,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 14:50:39,231 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 402 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:50:39,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 794 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1288 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:50:39,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66871 states. [2022-01-18 14:50:40,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66871 to 36382. [2022-01-18 14:50:40,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36382 states, 36381 states have (on average 4.2540336989087715) internal successors, (154766), 36381 states have internal predecessors, (154766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:50:40,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36382 states to 36382 states and 154766 transitions. [2022-01-18 14:50:40,772 INFO L78 Accepts]: Start accepts. Automaton has 36382 states and 154766 transitions. Word has length 28 [2022-01-18 14:50:40,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:50:40,772 INFO L470 AbstractCegarLoop]: Abstraction has 36382 states and 154766 transitions. [2022-01-18 14:50:40,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:50:40,772 INFO L276 IsEmpty]: Start isEmpty. Operand 36382 states and 154766 transitions. [2022-01-18 14:50:40,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:50:40,857 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:50:40,857 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:50:40,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-01-18 14:50:41,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-01-18 14:50:41,057 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 14:50:41,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:50:41,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1659972168, now seen corresponding path program 19 times [2022-01-18 14:50:41,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:50:41,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785173610] [2022-01-18 14:50:41,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:50:41,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:50:41,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:50:41,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:41,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:50:41,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785173610] [2022-01-18 14:50:41,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785173610] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:50:41,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130529055] [2022-01-18 14:50:41,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:50:41,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:50:41,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:50:41,089 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 14:50:41,089 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 14:50:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:50:41,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:50:41,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:50:41,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:41,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:50:41,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:41,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130529055] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:50:41,228 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:50:41,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-01-18 14:50:41,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645529106] [2022-01-18 14:50:41,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:50:41,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:50:41,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:50:41,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:50:41,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:50:41,229 INFO L87 Difference]: Start difference. First operand 36382 states and 154766 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 14:50:42,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:50:42,402 INFO L93 Difference]: Finished difference Result 63646 states and 253451 transitions. [2022-01-18 14:50:42,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 14:50:42,403 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 28 [2022-01-18 14:50:42,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:50:42,675 INFO L225 Difference]: With dead ends: 63646 [2022-01-18 14:50:42,675 INFO L226 Difference]: Without dead ends: 63550 [2022-01-18 14:50:42,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 14:50:42,675 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 492 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:50:42,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 488 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:50:42,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63550 states. [2022-01-18 14:50:43,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63550 to 36382. [2022-01-18 14:50:43,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36382 states, 36381 states have (on average 4.253374013908359) internal successors, (154742), 36381 states have internal predecessors, (154742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:50:44,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36382 states to 36382 states and 154742 transitions. [2022-01-18 14:50:44,123 INFO L78 Accepts]: Start accepts. Automaton has 36382 states and 154742 transitions. Word has length 28 [2022-01-18 14:50:44,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:50:44,123 INFO L470 AbstractCegarLoop]: Abstraction has 36382 states and 154742 transitions. [2022-01-18 14:50:44,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 14:50:44,123 INFO L276 IsEmpty]: Start isEmpty. Operand 36382 states and 154742 transitions. [2022-01-18 14:50:44,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:50:44,211 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:50:44,211 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:50:44,233 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 14:50:44,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 14:50:44,411 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 14:50:44,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:50:44,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1771747479, now seen corresponding path program 20 times [2022-01-18 14:50:44,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:50:44,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72740332] [2022-01-18 14:50:44,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:50:44,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:50:44,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:50:44,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:44,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:50:44,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72740332] [2022-01-18 14:50:44,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72740332] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:50:44,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439917883] [2022-01-18 14:50:44,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:50:44,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:50:44,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:50:44,443 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 14:50:44,444 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 14:50:44,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:50:44,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:50:44,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:50:44,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:50:44,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:44,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:50:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:44,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439917883] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:50:44,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:50:44,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 14:50:44,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646988221] [2022-01-18 14:50:44,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:50:44,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:50:44,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:50:44,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:50:44,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:50:44,572 INFO L87 Difference]: Start difference. First operand 36382 states and 154742 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:50:45,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:50:45,899 INFO L93 Difference]: Finished difference Result 56646 states and 234882 transitions. [2022-01-18 14:50:45,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 14:50:45,899 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 14:50:45,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:50:46,154 INFO L225 Difference]: With dead ends: 56646 [2022-01-18 14:50:46,154 INFO L226 Difference]: Without dead ends: 56646 [2022-01-18 14:50:46,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=1056, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 14:50:46,154 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 331 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:50:46,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 830 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 14:50:46,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56646 states. [2022-01-18 14:50:47,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56646 to 36990. [2022-01-18 14:50:47,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36990 states, 36989 states have (on average 4.222228230014329) internal successors, (156176), 36989 states have internal predecessors, (156176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:50:47,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36990 states to 36990 states and 156176 transitions. [2022-01-18 14:50:47,463 INFO L78 Accepts]: Start accepts. Automaton has 36990 states and 156176 transitions. Word has length 28 [2022-01-18 14:50:47,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:50:47,463 INFO L470 AbstractCegarLoop]: Abstraction has 36990 states and 156176 transitions. [2022-01-18 14:50:47,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:50:47,463 INFO L276 IsEmpty]: Start isEmpty. Operand 36990 states and 156176 transitions. [2022-01-18 14:50:47,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:50:47,540 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:50:47,540 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:50:47,563 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 14:50:47,741 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,SelfDestructingSolverStorable50 [2022-01-18 14:50:47,741 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 14:50:47,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:50:47,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1358668156, now seen corresponding path program 21 times [2022-01-18 14:50:47,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:50:47,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918406461] [2022-01-18 14:50:47,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:50:47,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:50:47,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:50:47,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:47,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:50:47,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918406461] [2022-01-18 14:50:47,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918406461] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:50:47,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117646936] [2022-01-18 14:50:47,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:50:47,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:50:47,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:50:47,777 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 14:50:47,778 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 14:50:47,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:50:47,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:50:47,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:50:47,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:50:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:47,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:50:47,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:47,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117646936] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:50:47,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:50:47,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 14:50:47,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577402888] [2022-01-18 14:50:47,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:50:47,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:50:47,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:50:47,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:50:47,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:50:47,903 INFO L87 Difference]: Start difference. First operand 36990 states and 156176 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:50:48,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:50:48,678 INFO L93 Difference]: Finished difference Result 55481 states and 220242 transitions. [2022-01-18 14:50:48,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 14:50:48,679 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 14:50:48,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:50:49,198 INFO L225 Difference]: With dead ends: 55481 [2022-01-18 14:50:49,198 INFO L226 Difference]: Without dead ends: 55385 [2022-01-18 14:50:49,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=844, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 14:50:49,199 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 402 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:50:49,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 560 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:50:49,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55385 states. [2022-01-18 14:50:50,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55385 to 37614. [2022-01-18 14:50:50,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37614 states, 37613 states have (on average 4.209661553186399) internal successors, (158338), 37613 states have internal predecessors, (158338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:50:50,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37614 states to 37614 states and 158338 transitions. [2022-01-18 14:50:50,384 INFO L78 Accepts]: Start accepts. Automaton has 37614 states and 158338 transitions. Word has length 28 [2022-01-18 14:50:50,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:50:50,384 INFO L470 AbstractCegarLoop]: Abstraction has 37614 states and 158338 transitions. [2022-01-18 14:50:50,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:50:50,384 INFO L276 IsEmpty]: Start isEmpty. Operand 37614 states and 158338 transitions. [2022-01-18 14:50:50,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:50:50,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:50:50,463 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:50:50,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-01-18 14:50:50,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:50:50,664 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 14:50:50,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:50:50,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1709825530, now seen corresponding path program 22 times [2022-01-18 14:50:50,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:50:50,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64066158] [2022-01-18 14:50:50,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:50:50,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:50:50,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:50:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:50,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:50:50,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64066158] [2022-01-18 14:50:50,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64066158] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:50:50,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160510997] [2022-01-18 14:50:50,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:50:50,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:50:50,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:50:50,697 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 14:50:50,698 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 14:50:50,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:50:50,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:50:50,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:50:50,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:50:50,803 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 14:50:50,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:50:50,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:50,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160510997] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:50:50,846 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:50:50,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11 [2022-01-18 14:50:50,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819465312] [2022-01-18 14:50:50,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:50:50,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:50:50,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:50:50,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:50:50,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:50:50,846 INFO L87 Difference]: Start difference. First operand 37614 states and 158338 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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 14:50:51,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:50:51,760 INFO L93 Difference]: Finished difference Result 64292 states and 259631 transitions. [2022-01-18 14:50:51,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 14:50:51,761 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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 28 [2022-01-18 14:50:51,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:50:52,324 INFO L225 Difference]: With dead ends: 64292 [2022-01-18 14:50:52,324 INFO L226 Difference]: Without dead ends: 64292 [2022-01-18 14:50:52,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 14:50:52,324 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 532 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:50:52,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 471 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:50:52,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64292 states. [2022-01-18 14:50:53,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64292 to 36800. [2022-01-18 14:50:53,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36800 states, 36799 states have (on average 4.195141172314465) internal successors, (154377), 36799 states have internal predecessors, (154377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:50:53,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36800 states to 36800 states and 154377 transitions. [2022-01-18 14:50:53,665 INFO L78 Accepts]: Start accepts. Automaton has 36800 states and 154377 transitions. Word has length 28 [2022-01-18 14:50:53,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:50:53,665 INFO L470 AbstractCegarLoop]: Abstraction has 36800 states and 154377 transitions. [2022-01-18 14:50:53,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 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 14:50:53,665 INFO L276 IsEmpty]: Start isEmpty. Operand 36800 states and 154377 transitions. [2022-01-18 14:50:53,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 14:50:53,741 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:50:53,742 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:50:53,756 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 14:50:53,942 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,SelfDestructingSolverStorable52 [2022-01-18 14:50:53,942 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 14:50:53,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:50:53,942 INFO L85 PathProgramCache]: Analyzing trace with hash 109327923, now seen corresponding path program 23 times [2022-01-18 14:50:53,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:50:53,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605293112] [2022-01-18 14:50:53,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:50:53,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:50:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:50:53,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:53,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:50:53,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605293112] [2022-01-18 14:50:53,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605293112] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:50:53,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372976475] [2022-01-18 14:50:53,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:50:53,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:50:53,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:50:53,983 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 14:50:53,984 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 14:50:54,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:50:54,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:50:54,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:50:54,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:50:54,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:54,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:50:54,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:54,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372976475] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:50:54,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:50:54,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11 [2022-01-18 14:50:54,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284416344] [2022-01-18 14:50:54,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:50:54,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:50:54,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:50:54,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:50:54,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:50:54,119 INFO L87 Difference]: Start difference. First operand 36800 states and 154377 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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 14:50:54,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:50:54,773 INFO L93 Difference]: Finished difference Result 46938 states and 189022 transitions. [2022-01-18 14:50:54,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 14:50:54,777 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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 28 [2022-01-18 14:50:54,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:50:54,930 INFO L225 Difference]: With dead ends: 46938 [2022-01-18 14:50:54,930 INFO L226 Difference]: Without dead ends: 46888 [2022-01-18 14:50:54,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2022-01-18 14:50:54,931 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 385 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:50:54,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 476 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:50:54,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46888 states. [2022-01-18 14:50:55,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46888 to 36135. [2022-01-18 14:50:56,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36135 states, 36134 states have (on average 4.197570155532186) internal successors, (151675), 36134 states have internal predecessors, (151675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:50:56,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36135 states to 36135 states and 151675 transitions. [2022-01-18 14:50:56,152 INFO L78 Accepts]: Start accepts. Automaton has 36135 states and 151675 transitions. Word has length 28 [2022-01-18 14:50:56,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:50:56,152 INFO L470 AbstractCegarLoop]: Abstraction has 36135 states and 151675 transitions. [2022-01-18 14:50:56,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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 14:50:56,152 INFO L276 IsEmpty]: Start isEmpty. Operand 36135 states and 151675 transitions. [2022-01-18 14:50:56,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 14:50:56,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:50:56,458 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:50:56,473 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 14:50:56,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:50:56,658 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 14:50:56,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:50:56,659 INFO L85 PathProgramCache]: Analyzing trace with hash 993334789, now seen corresponding path program 24 times [2022-01-18 14:50:56,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:50:56,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144640155] [2022-01-18 14:50:56,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:50:56,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:50:56,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:50:56,721 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:50:56,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:50:56,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144640155] [2022-01-18 14:50:56,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144640155] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:50:56,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048881972] [2022-01-18 14:50:56,722 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:50:56,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:50:56,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:50:56,723 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 14:50:56,724 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 14:50:56,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:50:56,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:50:56,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 14:50:56,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2022-01-18 15:03:57,033 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 15:03:57,033 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 15:03:58,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2022-01-18 15:03:58,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-18 15:03:59,168 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (4 of 5 remaining) [2022-01-18 15:03:59,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-18 15:03:59,168 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 32 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while executing Executor. [2022-01-18 15:03:59,169 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (3 of 5 remaining) [2022-01-18 15:03:59,169 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (2 of 5 remaining) [2022-01-18 15:03:59,169 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (1 of 5 remaining) [2022-01-18 15:03:59,169 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3INUSE_VIOLATION (0 of 5 remaining) [2022-01-18 15:03:59,171 INFO L732 BasicCegarLoop]: Path program histogram: [24, 23, 2, 2, 2, 1, 1] [2022-01-18 15:03:59,173 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 15:03:59,173 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 15:03:59,174 INFO L202 PluginConnector]: Adding new model exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 03:03:59 BasicIcfg [2022-01-18 15:03:59,174 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 15:03:59,174 INFO L158 Benchmark]: Toolchain (without parser) took 872116.90ms. Allocated memory was 375.4MB in the beginning and 14.8GB in the end (delta: 14.4GB). Free memory was 337.0MB in the beginning and 9.2GB in the end (delta: -8.9GB). Peak memory consumption was 13.4GB. Max. memory is 16.0GB. [2022-01-18 15:03:59,174 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 375.4MB. Free memory is still 338.1MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 15:03:59,174 INFO L158 Benchmark]: Boogie Procedure Inliner took 16.63ms. Allocated memory is still 375.4MB. Free memory was 336.9MB in the beginning and 335.4MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2022-01-18 15:03:59,175 INFO L158 Benchmark]: Boogie Preprocessor took 9.65ms. Allocated memory is still 375.4MB. Free memory was 335.4MB in the beginning and 334.4MB in the end (delta: 989.3kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 15:03:59,175 INFO L158 Benchmark]: RCFGBuilder took 166.14ms. Allocated memory is still 375.4MB. Free memory was 334.3MB in the beginning and 325.1MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2022-01-18 15:03:59,175 INFO L158 Benchmark]: TraceAbstraction took 871920.97ms. Allocated memory was 375.4MB in the beginning and 14.8GB in the end (delta: 14.4GB). Free memory was 324.6MB in the beginning and 9.2GB in the end (delta: -8.9GB). Peak memory consumption was 13.3GB. Max. memory is 16.0GB. [2022-01-18 15:03:59,175 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 0.10ms. Allocated memory is still 375.4MB. Free memory is still 338.1MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 16.63ms. Allocated memory is still 375.4MB. Free memory was 336.9MB in the beginning and 335.4MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 9.65ms. Allocated memory is still 375.4MB. Free memory was 335.4MB in the beginning and 334.4MB in the end (delta: 989.3kB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 166.14ms. Allocated memory is still 375.4MB. Free memory was 334.3MB in the beginning and 325.1MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 871920.97ms. Allocated memory was 375.4MB in the beginning and 14.8GB in the end (delta: 14.4GB). Free memory was 324.6MB in the beginning and 9.2GB in the end (delta: -8.9GB). Peak memory consumption was 13.3GB. 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: 64]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 32 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 32 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 32 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 32 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 32 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 58 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 871.8s, OverallIterations: 55, TraceHistogramMax: 2, PathProgramHistogramMax: 24, EmptinessCheckTime: 2.1s, AutomataDifference: 37.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 16246 SdHoareTripleChecker+Valid, 15.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 16246 mSDsluCounter, 21449 SdHoareTripleChecker+Invalid, 12.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 26447 mSDsCounter, 1451 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 34751 IncrementalHoareTripleChecker+Invalid, 36202 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1451 mSolverCounterUnsat, 3844 mSDtfsCounter, 34751 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3472 GetRequests, 2148 SyntacticMatches, 248 SemanticMatches, 1076 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6633 ImplicationChecksByTransitivity, 7.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37614occurred in iteration=52, InterpolantAutomatonStates: 1077, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 29.9s AutomataMinimizationTime, 54 MinimizatonAttempts, 539858 StatesRemovedByMinimization, 54 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 8.5s InterpolantComputationTime, 2707 NumberOfCodeBlocks, 2707 NumberOfCodeBlocksAsserted, 144 NumberOfCheckSat, 3825 ConstructedInterpolants, 0 QuantifiedInterpolants, 18682 SizeOfPredicates, 180 NumberOfNonLiveVariables, 3318 ConjunctsInSsa, 338 ConjunctsInUnsatCore, 146 InterpolantComputations, 8 PerfectInterpolantSequences, 393/759 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