/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/exp2x3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 14:46:04,368 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 14:46:04,376 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 14:46:04,410 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 14:46:04,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 14:46:04,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 14:46:04,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 14:46:04,466 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 14:46:04,492 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 14:46:04,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 14:46:04,493 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 14:46:04,493 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 14:46:04,493 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 14:46:04,493 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 14:46:04,494 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 14:46:04,494 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 14:46:04,494 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 14:46:04,494 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 14:46:04,495 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 14:46:04,495 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 14:46:04,495 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 14:46:04,495 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 14:46:04,495 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 14:46:04,495 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 14:46:04,495 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 14:46:04,495 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 14:46:04,495 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 14:46:04,495 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 14:46:04,495 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 14:46:04,495 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 14:46:04,496 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 14:46:04,496 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 14:46:04,496 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 14:46:04,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 14:46:04,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 14:46:04,497 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 14:46:04,497 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 14:46:04,497 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 14:46:04,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 14:46:04,497 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 14:46:04,497 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 14:46:04,497 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 14:46:04,497 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 14:46:04,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 14:46:04,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 14:46:04,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 14:46:04,694 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 14:46:04,696 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 14:46:04,697 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x3.wvr.bpl [2022-01-18 14:46:04,697 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x3.wvr.bpl' [2022-01-18 14:46:04,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 14:46:04,715 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 14:46:04,716 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 14:46:04,716 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 14:46:04,716 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 14:46:04,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:46:04" (1/1) ... [2022-01-18 14:46:04,728 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:46:04" (1/1) ... [2022-01-18 14:46:04,733 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 14:46:04,734 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 14:46:04,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 14:46:04,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 14:46:04,735 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 14:46:04,740 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:46:04" (1/1) ... [2022-01-18 14:46:04,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:46:04" (1/1) ... [2022-01-18 14:46:04,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:46:04" (1/1) ... [2022-01-18 14:46:04,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:46:04" (1/1) ... [2022-01-18 14:46:04,743 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:46:04" (1/1) ... [2022-01-18 14:46:04,746 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:46:04" (1/1) ... [2022-01-18 14:46:04,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:46:04" (1/1) ... [2022-01-18 14:46:04,748 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 14:46:04,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 14:46:04,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 14:46:04,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 14:46:04,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:46:04" (1/1) ... [2022-01-18 14:46:04,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 14:46:04,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:04,773 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 14:46:04,776 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 14:46:04,796 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 14:46:04,796 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 14:46:04,796 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 14:46:04,796 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 14:46:04,796 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 14:46:04,796 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 14:46:04,797 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 14:46:04,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 14:46:04,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 14:46:04,797 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 14:46:04,797 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 14:46:04,797 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 14:46:04,797 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-01-18 14:46:04,797 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-01-18 14:46:04,797 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-01-18 14:46:04,798 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 14:46:04,827 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 14:46:04,828 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 14:46:04,887 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 14:46:04,892 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 14:46:04,893 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 14:46:04,894 INFO L202 PluginConnector]: Adding new model exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 02:46:04 BoogieIcfgContainer [2022-01-18 14:46:04,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 14:46:04,896 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 14:46:04,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 14:46:04,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 14:46:04,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:46:04" (1/2) ... [2022-01-18 14:46:04,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2831eee4 and model type exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 02:46:04, skipping insertion in model container [2022-01-18 14:46:04,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 02:46:04" (2/2) ... [2022-01-18 14:46:04,900 INFO L111 eAbstractionObserver]: Analyzing ICFG exp2x3.wvr.bpl [2022-01-18 14:46:04,904 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 14:46:04,905 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 14:46:04,905 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 14:46:04,905 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 14:46:04,953 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-01-18 14:46:04,999 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 14:46:05,006 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 14:46:05,006 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-01-18 14:46:05,014 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 42 places, 33 transitions, 98 flow [2022-01-18 14:46:05,124 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 429 states, 428 states have (on average 3.8621495327102804) internal successors, (1653), 428 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:05,126 INFO L276 IsEmpty]: Start isEmpty. Operand has 429 states, 428 states have (on average 3.8621495327102804) internal successors, (1653), 428 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:05,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 14:46:05,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:05,138 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 14:46:05,138 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 14:46:05,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:05,142 INFO L85 PathProgramCache]: Analyzing trace with hash 768516577, now seen corresponding path program 1 times [2022-01-18 14:46:05,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:05,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611195000] [2022-01-18 14:46:05,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:05,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:05,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:05,285 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 14:46:05,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:05,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611195000] [2022-01-18 14:46:05,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611195000] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:46:05,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:46:05,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 14:46:05,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909266228] [2022-01-18 14:46:05,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:46:05,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 14:46:05,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:05,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 14:46:05,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 14:46:05,311 INFO L87 Difference]: Start difference. First operand has 429 states, 428 states have (on average 3.8621495327102804) internal successors, (1653), 428 states have internal predecessors, (1653), 0 states have call successors, (0), 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 14:46:05,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:05,407 INFO L93 Difference]: Finished difference Result 854 states and 3302 transitions. [2022-01-18 14:46:05,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 14:46:05,409 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 14:46:05,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:05,433 INFO L225 Difference]: With dead ends: 854 [2022-01-18 14:46:05,434 INFO L226 Difference]: Without dead ends: 823 [2022-01-18 14:46:05,444 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 14:46:05,446 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:05,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:46:05,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-01-18 14:46:05,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 558. [2022-01-18 14:46:05,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.8545780969479355) internal successors, (2147), 557 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:05,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 2147 transitions. [2022-01-18 14:46:05,560 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 2147 transitions. Word has length 19 [2022-01-18 14:46:05,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:05,561 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 2147 transitions. [2022-01-18 14:46:05,562 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 14:46:05,562 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 2147 transitions. [2022-01-18 14:46:05,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:46:05,566 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:05,566 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] [2022-01-18 14:46:05,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 14:46:05,566 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 14:46:05,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:05,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1817520191, now seen corresponding path program 1 times [2022-01-18 14:46:05,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:05,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333283415] [2022-01-18 14:46:05,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:05,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:05,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:05,644 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 14:46:05,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:05,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333283415] [2022-01-18 14:46:05,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333283415] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:05,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458566433] [2022-01-18 14:46:05,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:05,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:05,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:05,647 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 14:46:05,682 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 14:46:05,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:05,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 14:46:05,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:05,792 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 14:46:05,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:05,865 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 14:46:05,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458566433] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:05,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:05,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-01-18 14:46:05,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790342719] [2022-01-18 14:46:05,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:05,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 14:46:05,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:05,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 14:46:05,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 14:46:05,871 INFO L87 Difference]: Start difference. First operand 558 states and 2147 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:05,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:05,994 INFO L93 Difference]: Finished difference Result 1354 states and 5079 transitions. [2022-01-18 14:46:05,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 14:46:05,995 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 14:46:05,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:06,002 INFO L225 Difference]: With dead ends: 1354 [2022-01-18 14:46:06,002 INFO L226 Difference]: Without dead ends: 1354 [2022-01-18 14:46:06,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 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 14:46:06,004 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 108 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:06,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 54 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:46:06,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2022-01-18 14:46:06,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 687. [2022-01-18 14:46:06,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 3.956268221574344) internal successors, (2714), 686 states have internal predecessors, (2714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:06,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 2714 transitions. [2022-01-18 14:46:06,048 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 2714 transitions. Word has length 21 [2022-01-18 14:46:06,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:06,048 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 2714 transitions. [2022-01-18 14:46:06,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:06,049 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 2714 transitions. [2022-01-18 14:46:06,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:46:06,052 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:06,052 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] [2022-01-18 14:46:06,079 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 14:46:06,267 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 14:46:06,268 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 14:46:06,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:06,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1420211201, now seen corresponding path program 1 times [2022-01-18 14:46:06,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:06,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544644805] [2022-01-18 14:46:06,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:06,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:06,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:06,313 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 14:46:06,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:06,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544644805] [2022-01-18 14:46:06,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544644805] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:46:06,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:46:06,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 14:46:06,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255366016] [2022-01-18 14:46:06,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:46:06,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 14:46:06,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:06,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 14:46:06,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:46:06,315 INFO L87 Difference]: Start difference. First operand 687 states and 2714 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:06,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:06,362 INFO L93 Difference]: Finished difference Result 973 states and 3608 transitions. [2022-01-18 14:46:06,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 14:46:06,363 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 14:46:06,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:06,368 INFO L225 Difference]: With dead ends: 973 [2022-01-18 14:46:06,368 INFO L226 Difference]: Without dead ends: 953 [2022-01-18 14:46:06,368 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 14:46:06,370 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:06,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 31 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:46:06,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2022-01-18 14:46:06,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 775. [2022-01-18 14:46:06,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.8359173126614987) internal successors, (2969), 774 states have internal predecessors, (2969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:06,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2969 transitions. [2022-01-18 14:46:06,392 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2969 transitions. Word has length 21 [2022-01-18 14:46:06,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:06,392 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2969 transitions. [2022-01-18 14:46:06,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:06,392 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2969 transitions. [2022-01-18 14:46:06,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:46:06,394 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:06,394 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] [2022-01-18 14:46:06,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 14:46:06,395 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 14:46:06,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:06,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1433190623, now seen corresponding path program 1 times [2022-01-18 14:46:06,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:06,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358720561] [2022-01-18 14:46:06,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:06,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:06,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:06,444 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 14:46:06,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:06,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358720561] [2022-01-18 14:46:06,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358720561] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:06,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282813484] [2022-01-18 14:46:06,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:06,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:06,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:06,447 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 14:46:06,471 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 14:46:06,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:06,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 14:46:06,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:06,531 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 14:46:06,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:06,578 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 14:46:06,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282813484] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:06,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:06,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-01-18 14:46:06,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569261219] [2022-01-18 14:46:06,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:06,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 14:46:06,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:06,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 14:46:06,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 14:46:06,592 INFO L87 Difference]: Start difference. First operand 775 states and 2969 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 14:46:06,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:06,671 INFO L93 Difference]: Finished difference Result 1814 states and 6830 transitions. [2022-01-18 14:46:06,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 14:46:06,672 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 21 [2022-01-18 14:46:06,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:06,680 INFO L225 Difference]: With dead ends: 1814 [2022-01-18 14:46:06,680 INFO L226 Difference]: Without dead ends: 1814 [2022-01-18 14:46:06,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 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 14:46:06,682 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 76 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:06,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 61 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:46:06,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2022-01-18 14:46:06,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 990. [2022-01-18 14:46:06,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 989 states have (on average 3.969666329625885) internal successors, (3926), 989 states have internal predecessors, (3926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:06,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 3926 transitions. [2022-01-18 14:46:06,713 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 3926 transitions. Word has length 21 [2022-01-18 14:46:06,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:06,713 INFO L470 AbstractCegarLoop]: Abstraction has 990 states and 3926 transitions. [2022-01-18 14:46:06,713 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 14:46:06,714 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 3926 transitions. [2022-01-18 14:46:06,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:46:06,716 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:06,716 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] [2022-01-18 14:46:06,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-18 14:46:06,931 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,SelfDestructingSolverStorable3 [2022-01-18 14:46:06,932 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 14:46:06,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:06,932 INFO L85 PathProgramCache]: Analyzing trace with hash -586124957, now seen corresponding path program 1 times [2022-01-18 14:46:06,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:06,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323493324] [2022-01-18 14:46:06,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:06,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:06,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:06,967 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 14:46:06,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:06,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323493324] [2022-01-18 14:46:06,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323493324] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:46:06,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:46:06,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 14:46:06,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082854622] [2022-01-18 14:46:06,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:46:06,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 14:46:06,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:06,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 14:46:06,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:46:06,971 INFO L87 Difference]: Start difference. First operand 990 states and 3926 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:07,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:07,012 INFO L93 Difference]: Finished difference Result 1344 states and 5052 transitions. [2022-01-18 14:46:07,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 14:46:07,014 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 14:46:07,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:07,024 INFO L225 Difference]: With dead ends: 1344 [2022-01-18 14:46:07,024 INFO L226 Difference]: Without dead ends: 1279 [2022-01-18 14:46:07,025 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 14:46:07,025 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 32 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:07,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 33 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:46:07,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2022-01-18 14:46:07,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1100. [2022-01-18 14:46:07,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 1099 states have (on average 3.9008189262966333) internal successors, (4287), 1099 states have internal predecessors, (4287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:07,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 4287 transitions. [2022-01-18 14:46:07,053 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 4287 transitions. Word has length 21 [2022-01-18 14:46:07,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:07,053 INFO L470 AbstractCegarLoop]: Abstraction has 1100 states and 4287 transitions. [2022-01-18 14:46:07,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:07,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 4287 transitions. [2022-01-18 14:46:07,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:46:07,056 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:07,056 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] [2022-01-18 14:46:07,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 14:46:07,056 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 14:46:07,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:07,057 INFO L85 PathProgramCache]: Analyzing trace with hash 2039889319, now seen corresponding path program 2 times [2022-01-18 14:46:07,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:07,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107885914] [2022-01-18 14:46:07,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:07,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:07,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:07,096 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 14:46:07,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:07,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107885914] [2022-01-18 14:46:07,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107885914] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:46:07,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:46:07,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 14:46:07,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671328391] [2022-01-18 14:46:07,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:46:07,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 14:46:07,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:07,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 14:46:07,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:46:07,098 INFO L87 Difference]: Start difference. First operand 1100 states and 4287 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:07,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:07,144 INFO L93 Difference]: Finished difference Result 1412 states and 5401 transitions. [2022-01-18 14:46:07,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 14:46:07,144 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 14:46:07,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:07,151 INFO L225 Difference]: With dead ends: 1412 [2022-01-18 14:46:07,151 INFO L226 Difference]: Without dead ends: 1412 [2022-01-18 14:46:07,151 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 14:46:07,152 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 54 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:07,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 32 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:46:07,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2022-01-18 14:46:07,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1174. [2022-01-18 14:46:07,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 3.9028132992327365) internal successors, (4578), 1173 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:07,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 4578 transitions. [2022-01-18 14:46:07,179 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 4578 transitions. Word has length 21 [2022-01-18 14:46:07,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:07,179 INFO L470 AbstractCegarLoop]: Abstraction has 1174 states and 4578 transitions. [2022-01-18 14:46:07,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:07,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 4578 transitions. [2022-01-18 14:46:07,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 14:46:07,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:07,182 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] [2022-01-18 14:46:07,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-18 14:46:07,182 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 14:46:07,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:07,182 INFO L85 PathProgramCache]: Analyzing trace with hash -104341599, now seen corresponding path program 2 times [2022-01-18 14:46:07,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:07,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824320264] [2022-01-18 14:46:07,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:07,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:07,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:07,215 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 14:46:07,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:07,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824320264] [2022-01-18 14:46:07,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824320264] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:46:07,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:46:07,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 14:46:07,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868333224] [2022-01-18 14:46:07,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:46:07,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 14:46:07,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:07,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 14:46:07,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:46:07,216 INFO L87 Difference]: Start difference. First operand 1174 states and 4578 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:07,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:07,266 INFO L93 Difference]: Finished difference Result 1589 states and 6051 transitions. [2022-01-18 14:46:07,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 14:46:07,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 14:46:07,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:07,274 INFO L225 Difference]: With dead ends: 1589 [2022-01-18 14:46:07,274 INFO L226 Difference]: Without dead ends: 1589 [2022-01-18 14:46:07,274 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 14:46:07,275 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:07,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 43 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:46:07,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2022-01-18 14:46:07,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1285. [2022-01-18 14:46:07,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1284 states have (on average 3.9088785046728973) internal successors, (5019), 1284 states have internal predecessors, (5019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:07,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 5019 transitions. [2022-01-18 14:46:07,306 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 5019 transitions. Word has length 21 [2022-01-18 14:46:07,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:07,306 INFO L470 AbstractCegarLoop]: Abstraction has 1285 states and 5019 transitions. [2022-01-18 14:46:07,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:07,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 5019 transitions. [2022-01-18 14:46:07,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 14:46:07,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:07,309 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] [2022-01-18 14:46:07,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-18 14:46:07,310 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 14:46:07,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:07,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1270025759, now seen corresponding path program 1 times [2022-01-18 14:46:07,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:07,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917497382] [2022-01-18 14:46:07,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:07,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:07,396 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 14:46:07,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:07,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917497382] [2022-01-18 14:46:07,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917497382] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:07,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769445681] [2022-01-18 14:46:07,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:07,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:07,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:07,399 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 14:46:07,400 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 14:46:07,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:07,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:46:07,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:07,627 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 14:46:07,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:07,726 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 14:46:07,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769445681] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:07,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:07,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 3] total 4 [2022-01-18 14:46:07,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366046696] [2022-01-18 14:46:07,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:07,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 14:46:07,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:07,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 14:46:07,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:46:07,728 INFO L87 Difference]: Start difference. First operand 1285 states and 5019 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:07,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:07,817 INFO L93 Difference]: Finished difference Result 2143 states and 8130 transitions. [2022-01-18 14:46:07,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 14:46:07,817 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 14:46:07,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:07,826 INFO L225 Difference]: With dead ends: 2143 [2022-01-18 14:46:07,826 INFO L226 Difference]: Without dead ends: 2075 [2022-01-18 14:46:07,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:46:07,827 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 33 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:07,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 36 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:46:07,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2022-01-18 14:46:07,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 1564. [2022-01-18 14:46:07,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1563 states have (on average 3.9366602687140113) internal successors, (6153), 1563 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:07,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 6153 transitions. [2022-01-18 14:46:07,861 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 6153 transitions. Word has length 23 [2022-01-18 14:46:07,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:07,862 INFO L470 AbstractCegarLoop]: Abstraction has 1564 states and 6153 transitions. [2022-01-18 14:46:07,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:07,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 6153 transitions. [2022-01-18 14:46:07,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 14:46:07,865 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:07,865 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] [2022-01-18 14:46:07,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 14:46:08,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:08,080 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 14:46:08,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:08,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1128387681, now seen corresponding path program 2 times [2022-01-18 14:46:08,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:08,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119068098] [2022-01-18 14:46:08,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:08,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:08,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:08,114 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 14:46:08,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:08,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119068098] [2022-01-18 14:46:08,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119068098] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:46:08,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:46:08,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 14:46:08,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38910298] [2022-01-18 14:46:08,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:46:08,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 14:46:08,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:08,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 14:46:08,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:46:08,115 INFO L87 Difference]: Start difference. First operand 1564 states and 6153 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:08,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:08,196 INFO L93 Difference]: Finished difference Result 2365 states and 9064 transitions. [2022-01-18 14:46:08,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 14:46:08,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 14:46:08,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:08,207 INFO L225 Difference]: With dead ends: 2365 [2022-01-18 14:46:08,207 INFO L226 Difference]: Without dead ends: 2297 [2022-01-18 14:46:08,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:46:08,208 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:08,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 26 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:46:08,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2022-01-18 14:46:08,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 1785. [2022-01-18 14:46:08,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 3.9551569506726456) internal successors, (7056), 1784 states have internal predecessors, (7056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:08,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 7056 transitions. [2022-01-18 14:46:08,246 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 7056 transitions. Word has length 23 [2022-01-18 14:46:08,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:08,246 INFO L470 AbstractCegarLoop]: Abstraction has 1785 states and 7056 transitions. [2022-01-18 14:46:08,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:08,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 7056 transitions. [2022-01-18 14:46:08,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 14:46:08,250 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:08,250 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] [2022-01-18 14:46:08,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-18 14:46:08,250 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 14:46:08,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:08,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1784493855, now seen corresponding path program 1 times [2022-01-18 14:46:08,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:08,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46204675] [2022-01-18 14:46:08,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:08,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:08,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:08,282 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 14:46:08,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:08,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46204675] [2022-01-18 14:46:08,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46204675] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:08,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74298246] [2022-01-18 14:46:08,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:08,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:08,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:08,297 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 14:46:08,297 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 14:46:08,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:08,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 14:46:08,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:08,466 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 14:46:08,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:08,547 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 14:46:08,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74298246] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:08,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:08,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 3] total 4 [2022-01-18 14:46:08,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358969829] [2022-01-18 14:46:08,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:08,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 14:46:08,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:08,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 14:46:08,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:46:08,548 INFO L87 Difference]: Start difference. First operand 1785 states and 7056 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 14:46:08,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:08,626 INFO L93 Difference]: Finished difference Result 2448 states and 9424 transitions. [2022-01-18 14:46:08,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 14:46:08,626 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 23 [2022-01-18 14:46:08,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:08,634 INFO L225 Difference]: With dead ends: 2448 [2022-01-18 14:46:08,634 INFO L226 Difference]: Without dead ends: 2397 [2022-01-18 14:46:08,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:46:08,634 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:08,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 39 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:46:08,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2397 states. [2022-01-18 14:46:08,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2397 to 2051. [2022-01-18 14:46:08,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.951219512195122) internal successors, (8100), 2050 states have internal predecessors, (8100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:08,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 8100 transitions. [2022-01-18 14:46:08,683 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 8100 transitions. Word has length 23 [2022-01-18 14:46:08,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:08,684 INFO L470 AbstractCegarLoop]: Abstraction has 2051 states and 8100 transitions. [2022-01-18 14:46:08,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 14:46:08,684 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 8100 transitions. [2022-01-18 14:46:08,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 14:46:08,689 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:08,689 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] [2022-01-18 14:46:08,707 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 14:46:08,898 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 14:46:08,899 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 14:46:08,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:08,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1452355087, now seen corresponding path program 2 times [2022-01-18 14:46:08,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:08,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428035719] [2022-01-18 14:46:08,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:08,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:08,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:08,931 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 14:46:08,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:08,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428035719] [2022-01-18 14:46:08,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428035719] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:46:08,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:46:08,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 14:46:08,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918762511] [2022-01-18 14:46:08,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:46:08,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 14:46:08,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:08,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 14:46:08,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:46:08,932 INFO L87 Difference]: Start difference. First operand 2051 states and 8100 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:08,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:08,985 INFO L93 Difference]: Finished difference Result 2710 states and 10468 transitions. [2022-01-18 14:46:08,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 14:46:08,985 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 14:46:08,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:08,993 INFO L225 Difference]: With dead ends: 2710 [2022-01-18 14:46:08,993 INFO L226 Difference]: Without dead ends: 2659 [2022-01-18 14:46:08,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 14:46:08,994 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:08,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 27 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 14:46:08,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2022-01-18 14:46:09,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 2311. [2022-01-18 14:46:09,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2311 states, 2310 states have (on average 3.9484848484848483) internal successors, (9121), 2310 states have internal predecessors, (9121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:09,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 9121 transitions. [2022-01-18 14:46:09,068 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 9121 transitions. Word has length 23 [2022-01-18 14:46:09,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:09,068 INFO L470 AbstractCegarLoop]: Abstraction has 2311 states and 9121 transitions. [2022-01-18 14:46:09,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:09,069 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 9121 transitions. [2022-01-18 14:46:09,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:46:09,074 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:09,074 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:46:09,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-18 14:46:09,074 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 14:46:09,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:09,075 INFO L85 PathProgramCache]: Analyzing trace with hash -397256989, now seen corresponding path program 3 times [2022-01-18 14:46:09,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:09,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686437791] [2022-01-18 14:46:09,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:09,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:09,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:09,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686437791] [2022-01-18 14:46:09,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686437791] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:09,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882493832] [2022-01-18 14:46:09,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:46:09,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:09,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:09,109 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 14:46:09,147 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 14:46:09,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:46:09,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:46:09,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:46:09,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:09,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:09,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:09,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:09,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882493832] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:09,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:09,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-01-18 14:46:09,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840443007] [2022-01-18 14:46:09,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:09,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:46:09,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:09,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:46:09,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:46:09,253 INFO L87 Difference]: Start difference. First operand 2311 states and 9121 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:09,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:09,631 INFO L93 Difference]: Finished difference Result 6038 states and 23046 transitions. [2022-01-18 14:46:09,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:46:09,631 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 14:46:09,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:09,648 INFO L225 Difference]: With dead ends: 6038 [2022-01-18 14:46:09,649 INFO L226 Difference]: Without dead ends: 6038 [2022-01-18 14:46:09,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:46:09,649 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 186 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:09,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 252 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:46:09,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6038 states. [2022-01-18 14:46:09,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6038 to 2800. [2022-01-18 14:46:09,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2800 states, 2799 states have (on average 4.00821722043587) internal successors, (11219), 2799 states have internal predecessors, (11219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:09,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2800 states to 2800 states and 11219 transitions. [2022-01-18 14:46:09,726 INFO L78 Accepts]: Start accepts. Automaton has 2800 states and 11219 transitions. Word has length 25 [2022-01-18 14:46:09,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:09,727 INFO L470 AbstractCegarLoop]: Abstraction has 2800 states and 11219 transitions. [2022-01-18 14:46:09,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:09,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2800 states and 11219 transitions. [2022-01-18 14:46:09,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:46:09,732 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:09,732 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:46:09,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-18 14:46:09,951 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 14:46:09,951 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 14:46:09,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:09,951 INFO L85 PathProgramCache]: Analyzing trace with hash -2030384925, now seen corresponding path program 4 times [2022-01-18 14:46:09,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:09,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895996485] [2022-01-18 14:46:09,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:09,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:09,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:09,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:09,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:09,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895996485] [2022-01-18 14:46:09,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895996485] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:09,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845439955] [2022-01-18 14:46:09,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:46:09,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:09,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:09,978 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 14:46:09,991 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 14:46:10,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:46:10,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:46:10,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:46:10,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:10,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:10,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:10,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:10,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845439955] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:10,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:10,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-01-18 14:46:10,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195512542] [2022-01-18 14:46:10,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:10,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:46:10,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:10,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:46:10,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:46:10,113 INFO L87 Difference]: Start difference. First operand 2800 states and 11219 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:10,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:10,313 INFO L93 Difference]: Finished difference Result 5607 states and 21463 transitions. [2022-01-18 14:46:10,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:46:10,314 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 14:46:10,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:10,329 INFO L225 Difference]: With dead ends: 5607 [2022-01-18 14:46:10,329 INFO L226 Difference]: Without dead ends: 5495 [2022-01-18 14:46:10,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-01-18 14:46:10,330 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 250 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:10,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 142 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:46:10,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5495 states. [2022-01-18 14:46:10,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5495 to 3696. [2022-01-18 14:46:10,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3696 states, 3695 states have (on average 4.088227334235453) internal successors, (15106), 3695 states have internal predecessors, (15106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:10,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3696 states to 3696 states and 15106 transitions. [2022-01-18 14:46:10,443 INFO L78 Accepts]: Start accepts. Automaton has 3696 states and 15106 transitions. Word has length 25 [2022-01-18 14:46:10,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:10,443 INFO L470 AbstractCegarLoop]: Abstraction has 3696 states and 15106 transitions. [2022-01-18 14:46:10,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:10,444 INFO L276 IsEmpty]: Start isEmpty. Operand 3696 states and 15106 transitions. [2022-01-18 14:46:10,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:46:10,453 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:10,453 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:46:10,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-18 14:46:10,667 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 14:46:10,667 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 14:46:10,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:10,668 INFO L85 PathProgramCache]: Analyzing trace with hash -638630689, now seen corresponding path program 5 times [2022-01-18 14:46:10,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:10,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407117339] [2022-01-18 14:46:10,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:10,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:10,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:10,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:10,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407117339] [2022-01-18 14:46:10,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407117339] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:10,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891729414] [2022-01-18 14:46:10,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:46:10,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:10,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:10,691 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 14:46:10,692 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 14:46:10,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:46:10,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:46:10,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:46:10,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:10,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:10,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:10,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:10,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891729414] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:10,794 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:10,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-01-18 14:46:10,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839469128] [2022-01-18 14:46:10,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:10,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:46:10,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:10,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:46:10,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:46:10,795 INFO L87 Difference]: Start difference. First operand 3696 states and 15106 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:10,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:10,982 INFO L93 Difference]: Finished difference Result 5302 states and 20641 transitions. [2022-01-18 14:46:10,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:46:10,982 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 14:46:10,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:10,998 INFO L225 Difference]: With dead ends: 5302 [2022-01-18 14:46:10,998 INFO L226 Difference]: Without dead ends: 5302 [2022-01-18 14:46:10,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:46:10,998 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 252 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:10,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 126 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:46:11,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5302 states. [2022-01-18 14:46:11,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5302 to 3659. [2022-01-18 14:46:11,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3659 states, 3658 states have (on average 4.064516129032258) internal successors, (14868), 3658 states have internal predecessors, (14868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:11,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3659 states to 3659 states and 14868 transitions. [2022-01-18 14:46:11,089 INFO L78 Accepts]: Start accepts. Automaton has 3659 states and 14868 transitions. Word has length 25 [2022-01-18 14:46:11,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:11,089 INFO L470 AbstractCegarLoop]: Abstraction has 3659 states and 14868 transitions. [2022-01-18 14:46:11,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:11,090 INFO L276 IsEmpty]: Start isEmpty. Operand 3659 states and 14868 transitions. [2022-01-18 14:46:11,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:46:11,098 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:11,098 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:46:11,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 14:46:11,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:11,310 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 14:46:11,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:11,311 INFO L85 PathProgramCache]: Analyzing trace with hash -192019813, now seen corresponding path program 6 times [2022-01-18 14:46:11,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:11,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258726075] [2022-01-18 14:46:11,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:11,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:11,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:11,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:11,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:11,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258726075] [2022-01-18 14:46:11,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258726075] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:11,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092165618] [2022-01-18 14:46:11,331 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:46:11,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:11,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:11,332 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 14:46:11,333 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 14:46:11,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 14:46:11,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:46:11,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:46:11,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:11,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:11,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:11,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:11,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092165618] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:11,446 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:11,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-01-18 14:46:11,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927449365] [2022-01-18 14:46:11,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:11,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:46:11,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:11,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:46:11,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:46:11,447 INFO L87 Difference]: Start difference. First operand 3659 states and 14868 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:11,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:11,673 INFO L93 Difference]: Finished difference Result 4788 states and 18687 transitions. [2022-01-18 14:46:11,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:46:11,673 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 14:46:11,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:11,688 INFO L225 Difference]: With dead ends: 4788 [2022-01-18 14:46:11,688 INFO L226 Difference]: Without dead ends: 4768 [2022-01-18 14:46:11,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:46:11,689 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 158 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:11,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 189 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:46:11,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4768 states. [2022-01-18 14:46:11,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4768 to 3665. [2022-01-18 14:46:11,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3665 states, 3664 states have (on average 4.060316593886463) internal successors, (14877), 3664 states have internal predecessors, (14877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:11,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3665 states to 3665 states and 14877 transitions. [2022-01-18 14:46:11,780 INFO L78 Accepts]: Start accepts. Automaton has 3665 states and 14877 transitions. Word has length 25 [2022-01-18 14:46:11,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:11,780 INFO L470 AbstractCegarLoop]: Abstraction has 3665 states and 14877 transitions. [2022-01-18 14:46:11,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:11,780 INFO L276 IsEmpty]: Start isEmpty. Operand 3665 states and 14877 transitions. [2022-01-18 14:46:11,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:46:11,788 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:11,789 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:46:11,804 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 14:46:12,003 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,SelfDestructingSolverStorable14 [2022-01-18 14:46:12,004 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 14:46:12,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:12,004 INFO L85 PathProgramCache]: Analyzing trace with hash -2044906781, now seen corresponding path program 7 times [2022-01-18 14:46:12,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:12,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200041668] [2022-01-18 14:46:12,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:12,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:12,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:12,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:12,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:12,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200041668] [2022-01-18 14:46:12,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200041668] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:12,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527359734] [2022-01-18 14:46:12,034 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:46:12,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:12,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:12,035 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 14:46:12,041 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 14:46:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:12,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:46:12,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:12,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:12,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:12,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:46:12,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527359734] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:12,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:12,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-01-18 14:46:12,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993055597] [2022-01-18 14:46:12,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:12,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:46:12,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:12,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:46:12,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:46:12,162 INFO L87 Difference]: Start difference. First operand 3665 states and 14877 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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 14:46:12,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:12,367 INFO L93 Difference]: Finished difference Result 7954 states and 31437 transitions. [2022-01-18 14:46:12,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:46:12,367 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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 25 [2022-01-18 14:46:12,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:12,389 INFO L225 Difference]: With dead ends: 7954 [2022-01-18 14:46:12,390 INFO L226 Difference]: Without dead ends: 7954 [2022-01-18 14:46:12,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:46:12,390 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 258 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:12,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 120 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:46:12,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7954 states. [2022-01-18 14:46:12,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7954 to 4610. [2022-01-18 14:46:12,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4609 states have (on average 4.175092210891734) internal successors, (19243), 4609 states have internal predecessors, (19243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:12,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 19243 transitions. [2022-01-18 14:46:12,509 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 19243 transitions. Word has length 25 [2022-01-18 14:46:12,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:12,509 INFO L470 AbstractCegarLoop]: Abstraction has 4610 states and 19243 transitions. [2022-01-18 14:46:12,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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 14:46:12,509 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 19243 transitions. [2022-01-18 14:46:12,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:46:12,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:12,518 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:46:12,536 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 14:46:12,736 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,SelfDestructingSolverStorable15 [2022-01-18 14:46:12,736 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 14:46:12,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:12,737 INFO L85 PathProgramCache]: Analyzing trace with hash 742460259, now seen corresponding path program 8 times [2022-01-18 14:46:12,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:12,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710242665] [2022-01-18 14:46:12,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:12,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:12,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:12,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:12,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:12,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710242665] [2022-01-18 14:46:12,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710242665] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:12,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341090908] [2022-01-18 14:46:12,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:46:12,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:12,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:12,768 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 14:46:12,769 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 14:46:12,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:46:12,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:46:12,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:46:12,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:12,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:12,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:46:12,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341090908] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:12,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:12,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-01-18 14:46:12,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115699002] [2022-01-18 14:46:12,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:12,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:46:12,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:12,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:46:12,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:46:12,871 INFO L87 Difference]: Start difference. First operand 4610 states and 19243 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 14:46:13,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:13,071 INFO L93 Difference]: Finished difference Result 6087 states and 24217 transitions. [2022-01-18 14:46:13,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:46:13,072 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 14:46:13,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:13,086 INFO L225 Difference]: With dead ends: 6087 [2022-01-18 14:46:13,087 INFO L226 Difference]: Without dead ends: 6059 [2022-01-18 14:46:13,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:46:13,087 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 150 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:13,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 207 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:46:13,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6059 states. [2022-01-18 14:46:13,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6059 to 4587. [2022-01-18 14:46:13,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4587 states, 4586 states have (on average 4.174662014827737) internal successors, (19145), 4586 states have internal predecessors, (19145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:13,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4587 states to 4587 states and 19145 transitions. [2022-01-18 14:46:13,198 INFO L78 Accepts]: Start accepts. Automaton has 4587 states and 19145 transitions. Word has length 25 [2022-01-18 14:46:13,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:13,198 INFO L470 AbstractCegarLoop]: Abstraction has 4587 states and 19145 transitions. [2022-01-18 14:46:13,198 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 14:46:13,199 INFO L276 IsEmpty]: Start isEmpty. Operand 4587 states and 19145 transitions. [2022-01-18 14:46:13,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:46:13,208 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:13,208 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:46:13,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-01-18 14:46:13,423 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,SelfDestructingSolverStorable16 [2022-01-18 14:46:13,423 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 14:46:13,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:13,424 INFO L85 PathProgramCache]: Analyzing trace with hash -316492321, now seen corresponding path program 9 times [2022-01-18 14:46:13,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:13,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022315139] [2022-01-18 14:46:13,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:13,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:13,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:13,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:13,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:13,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022315139] [2022-01-18 14:46:13,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022315139] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:13,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075646593] [2022-01-18 14:46:13,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:46:13,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:13,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:13,449 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 14:46:13,450 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 14:46:13,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:46:13,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:46:13,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:46:13,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:13,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:13,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:13,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:46:13,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075646593] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:13,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:13,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-01-18 14:46:13,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200527686] [2022-01-18 14:46:13,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:13,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:46:13,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:13,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:46:13,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:46:13,568 INFO L87 Difference]: Start difference. First operand 4587 states and 19145 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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 14:46:13,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:13,805 INFO L93 Difference]: Finished difference Result 6950 states and 27646 transitions. [2022-01-18 14:46:13,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:46:13,805 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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 25 [2022-01-18 14:46:13,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:13,821 INFO L225 Difference]: With dead ends: 6950 [2022-01-18 14:46:13,821 INFO L226 Difference]: Without dead ends: 6950 [2022-01-18 14:46:13,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:46:13,822 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 189 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:13,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 192 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:46:13,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6950 states. [2022-01-18 14:46:13,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6950 to 4669. [2022-01-18 14:46:13,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4669 states, 4668 states have (on average 4.1782347900599826) internal successors, (19504), 4668 states have internal predecessors, (19504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:13,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4669 states to 4669 states and 19504 transitions. [2022-01-18 14:46:13,915 INFO L78 Accepts]: Start accepts. Automaton has 4669 states and 19504 transitions. Word has length 25 [2022-01-18 14:46:13,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:13,915 INFO L470 AbstractCegarLoop]: Abstraction has 4669 states and 19504 transitions. [2022-01-18 14:46:13,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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 14:46:13,915 INFO L276 IsEmpty]: Start isEmpty. Operand 4669 states and 19504 transitions. [2022-01-18 14:46:13,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:46:13,925 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:13,925 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:46:13,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 14:46:14,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 14:46:14,140 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 14:46:14,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:14,140 INFO L85 PathProgramCache]: Analyzing trace with hash 130118555, now seen corresponding path program 10 times [2022-01-18 14:46:14,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:14,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910141353] [2022-01-18 14:46:14,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:14,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:14,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:14,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:14,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910141353] [2022-01-18 14:46:14,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910141353] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:14,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161677420] [2022-01-18 14:46:14,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:46:14,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:14,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:14,176 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 14:46:14,180 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 14:46:14,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:46:14,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:46:14,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:46:14,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:14,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:14,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:46:14,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161677420] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:14,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:14,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-01-18 14:46:14,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941564160] [2022-01-18 14:46:14,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:14,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:46:14,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:14,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:46:14,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:46:14,307 INFO L87 Difference]: Start difference. First operand 4669 states and 19504 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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 14:46:14,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:14,502 INFO L93 Difference]: Finished difference Result 7627 states and 29903 transitions. [2022-01-18 14:46:14,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:46:14,502 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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 25 [2022-01-18 14:46:14,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:14,549 INFO L225 Difference]: With dead ends: 7627 [2022-01-18 14:46:14,550 INFO L226 Difference]: Without dead ends: 7607 [2022-01-18 14:46:14,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:46:14,550 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 265 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:14,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 151 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:46:14,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7607 states. [2022-01-18 14:46:14,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7607 to 4687. [2022-01-18 14:46:14,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4687 states, 4686 states have (on average 4.173068715322237) internal successors, (19555), 4686 states have internal predecessors, (19555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:14,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4687 states to 4687 states and 19555 transitions. [2022-01-18 14:46:14,642 INFO L78 Accepts]: Start accepts. Automaton has 4687 states and 19555 transitions. Word has length 25 [2022-01-18 14:46:14,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:14,642 INFO L470 AbstractCegarLoop]: Abstraction has 4687 states and 19555 transitions. [2022-01-18 14:46:14,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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 14:46:14,642 INFO L276 IsEmpty]: Start isEmpty. Operand 4687 states and 19555 transitions. [2022-01-18 14:46:14,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:46:14,650 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:14,650 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:46:14,666 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 14:46:14,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:14,851 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 14:46:14,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:14,851 INFO L85 PathProgramCache]: Analyzing trace with hash -585238749, now seen corresponding path program 11 times [2022-01-18 14:46:14,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:14,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333439476] [2022-01-18 14:46:14,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:14,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:14,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:14,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:14,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333439476] [2022-01-18 14:46:14,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333439476] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:14,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907526967] [2022-01-18 14:46:14,883 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:46:14,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:14,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:14,884 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 14:46:14,885 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 14:46:14,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:46:14,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:46:14,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:46:14,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:14,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:15,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:15,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907526967] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:15,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:15,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-01-18 14:46:15,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043653208] [2022-01-18 14:46:15,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:15,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:46:15,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:15,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:46:15,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:46:15,009 INFO L87 Difference]: Start difference. First operand 4687 states and 19555 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:15,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:15,326 INFO L93 Difference]: Finished difference Result 7378 states and 29710 transitions. [2022-01-18 14:46:15,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:46:15,326 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 14:46:15,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:15,343 INFO L225 Difference]: With dead ends: 7378 [2022-01-18 14:46:15,343 INFO L226 Difference]: Without dead ends: 7378 [2022-01-18 14:46:15,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:46:15,344 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 161 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:15,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 233 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:46:15,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7378 states. [2022-01-18 14:46:15,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7378 to 5057. [2022-01-18 14:46:15,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5057 states, 5056 states have (on average 4.166139240506329) internal successors, (21064), 5056 states have internal predecessors, (21064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:15,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5057 states to 5057 states and 21064 transitions. [2022-01-18 14:46:15,442 INFO L78 Accepts]: Start accepts. Automaton has 5057 states and 21064 transitions. Word has length 25 [2022-01-18 14:46:15,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:15,442 INFO L470 AbstractCegarLoop]: Abstraction has 5057 states and 21064 transitions. [2022-01-18 14:46:15,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:15,442 INFO L276 IsEmpty]: Start isEmpty. Operand 5057 states and 21064 transitions. [2022-01-18 14:46:15,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:46:15,452 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:15,452 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:46:15,467 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 14:46:15,652 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,SelfDestructingSolverStorable19 [2022-01-18 14:46:15,652 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 14:46:15,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:15,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1874482561, now seen corresponding path program 12 times [2022-01-18 14:46:15,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:15,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584619932] [2022-01-18 14:46:15,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:15,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:15,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:15,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:15,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:15,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584619932] [2022-01-18 14:46:15,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584619932] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:15,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572025117] [2022-01-18 14:46:15,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:46:15,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:15,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:15,679 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 14:46:15,696 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 14:46:15,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:46:15,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:46:15,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:46:15,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:15,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:15,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:15,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:15,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572025117] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:15,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:15,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-01-18 14:46:15,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852570959] [2022-01-18 14:46:15,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:15,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:46:15,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:15,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:46:15,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:46:15,788 INFO L87 Difference]: Start difference. First operand 5057 states and 21064 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:16,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:16,028 INFO L93 Difference]: Finished difference Result 7943 states and 31115 transitions. [2022-01-18 14:46:16,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:46:16,029 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 14:46:16,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:16,052 INFO L225 Difference]: With dead ends: 7943 [2022-01-18 14:46:16,052 INFO L226 Difference]: Without dead ends: 7883 [2022-01-18 14:46:16,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 3 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 14:46:16,052 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 260 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:16,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 138 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:46:16,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7883 states. [2022-01-18 14:46:16,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7883 to 5255. [2022-01-18 14:46:16,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5255 states, 5254 states have (on average 4.142558051008756) internal successors, (21765), 5254 states have internal predecessors, (21765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:16,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5255 states to 5255 states and 21765 transitions. [2022-01-18 14:46:16,176 INFO L78 Accepts]: Start accepts. Automaton has 5255 states and 21765 transitions. Word has length 25 [2022-01-18 14:46:16,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:16,176 INFO L470 AbstractCegarLoop]: Abstraction has 5255 states and 21765 transitions. [2022-01-18 14:46:16,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:16,176 INFO L276 IsEmpty]: Start isEmpty. Operand 5255 states and 21765 transitions. [2022-01-18 14:46:16,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:46:16,187 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:16,187 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:46:16,205 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 14:46:16,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:16,403 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 14:46:16,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:16,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1929197791, now seen corresponding path program 3 times [2022-01-18 14:46:16,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:16,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491768115] [2022-01-18 14:46:16,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:16,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:16,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:16,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:16,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:16,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491768115] [2022-01-18 14:46:16,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491768115] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:16,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454476650] [2022-01-18 14:46:16,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:46:16,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:16,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:16,432 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 14:46:16,433 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 14:46:16,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:46:16,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:46:16,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:46:16,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:16,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:16,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:16,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:16,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454476650] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:16,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:16,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-01-18 14:46:16,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433909315] [2022-01-18 14:46:16,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:16,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:46:16,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:16,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:46:16,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:46:16,552 INFO L87 Difference]: Start difference. First operand 5255 states and 21765 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 14:46:16,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:16,988 INFO L93 Difference]: Finished difference Result 16146 states and 66180 transitions. [2022-01-18 14:46:16,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:46:16,988 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 14:46:16,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:17,033 INFO L225 Difference]: With dead ends: 16146 [2022-01-18 14:46:17,034 INFO L226 Difference]: Without dead ends: 16146 [2022-01-18 14:46:17,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:46:17,034 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 156 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:17,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 268 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:46:17,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16146 states. [2022-01-18 14:46:17,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16146 to 7401. [2022-01-18 14:46:17,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7401 states, 7400 states have (on average 4.2628378378378375) internal successors, (31545), 7400 states have internal predecessors, (31545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:17,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7401 states to 7401 states and 31545 transitions. [2022-01-18 14:46:17,302 INFO L78 Accepts]: Start accepts. Automaton has 7401 states and 31545 transitions. Word has length 25 [2022-01-18 14:46:17,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:17,302 INFO L470 AbstractCegarLoop]: Abstraction has 7401 states and 31545 transitions. [2022-01-18 14:46:17,302 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 14:46:17,302 INFO L276 IsEmpty]: Start isEmpty. Operand 7401 states and 31545 transitions. [2022-01-18 14:46:17,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:46:17,350 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:17,351 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:46:17,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-01-18 14:46:17,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:17,551 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 14:46:17,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:17,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1602824093, now seen corresponding path program 4 times [2022-01-18 14:46:17,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:17,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897132515] [2022-01-18 14:46:17,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:17,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:17,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:17,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:17,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:17,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897132515] [2022-01-18 14:46:17,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897132515] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:17,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820193589] [2022-01-18 14:46:17,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:46:17,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:17,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:17,581 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 14:46:17,582 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 14:46:17,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:46:17,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:46:17,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:46:17,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:17,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:17,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:17,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820193589] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:17,726 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:17,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-01-18 14:46:17,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549531266] [2022-01-18 14:46:17,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:17,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:46:17,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:17,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:46:17,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:46:17,726 INFO L87 Difference]: Start difference. First operand 7401 states and 31545 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:17,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:17,998 INFO L93 Difference]: Finished difference Result 15690 states and 65076 transitions. [2022-01-18 14:46:17,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:46:17,998 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have 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 14:46:17,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:18,043 INFO L225 Difference]: With dead ends: 15690 [2022-01-18 14:46:18,043 INFO L226 Difference]: Without dead ends: 15594 [2022-01-18 14:46:18,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 3 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 14:46:18,044 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 209 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:18,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 155 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:46:18,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15594 states. [2022-01-18 14:46:18,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15594 to 10713. [2022-01-18 14:46:18,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10713 states, 10712 states have (on average 4.391150112023898) internal successors, (47038), 10712 states have internal predecessors, (47038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:18,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10713 states to 10713 states and 47038 transitions. [2022-01-18 14:46:18,319 INFO L78 Accepts]: Start accepts. Automaton has 10713 states and 47038 transitions. Word has length 25 [2022-01-18 14:46:18,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:18,319 INFO L470 AbstractCegarLoop]: Abstraction has 10713 states and 47038 transitions. [2022-01-18 14:46:18,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:18,319 INFO L276 IsEmpty]: Start isEmpty. Operand 10713 states and 47038 transitions. [2022-01-18 14:46:18,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:46:18,340 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:18,340 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:46:18,356 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 14:46:18,541 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,SelfDestructingSolverStorable22 [2022-01-18 14:46:18,541 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 14:46:18,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:18,541 INFO L85 PathProgramCache]: Analyzing trace with hash -829404249, now seen corresponding path program 5 times [2022-01-18 14:46:18,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:18,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637589605] [2022-01-18 14:46:18,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:18,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:18,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:18,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:18,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637589605] [2022-01-18 14:46:18,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637589605] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:18,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349740422] [2022-01-18 14:46:18,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:46:18,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:18,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:18,562 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 14:46:18,563 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 14:46:18,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:46:18,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:46:18,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:46:18,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:18,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:18,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:18,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349740422] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:18,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:18,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-01-18 14:46:18,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276977074] [2022-01-18 14:46:18,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:18,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:46:18,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:18,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:46:18,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:46:18,669 INFO L87 Difference]: Start difference. First operand 10713 states and 47038 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 14:46:19,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:19,033 INFO L93 Difference]: Finished difference Result 15255 states and 64180 transitions. [2022-01-18 14:46:19,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:46:19,035 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 14:46:19,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:19,090 INFO L225 Difference]: With dead ends: 15255 [2022-01-18 14:46:19,091 INFO L226 Difference]: Without dead ends: 15255 [2022-01-18 14:46:19,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:46:19,091 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 223 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:19,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 117 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:46:19,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15255 states. [2022-01-18 14:46:19,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15255 to 10587. [2022-01-18 14:46:19,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10587 states, 10586 states have (on average 4.366616285660306) internal successors, (46225), 10586 states have internal predecessors, (46225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:19,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10587 states to 10587 states and 46225 transitions. [2022-01-18 14:46:19,446 INFO L78 Accepts]: Start accepts. Automaton has 10587 states and 46225 transitions. Word has length 25 [2022-01-18 14:46:19,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:19,446 INFO L470 AbstractCegarLoop]: Abstraction has 10587 states and 46225 transitions. [2022-01-18 14:46:19,446 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 14:46:19,446 INFO L276 IsEmpty]: Start isEmpty. Operand 10587 states and 46225 transitions. [2022-01-18 14:46:19,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:46:19,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:19,468 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:46:19,483 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 14:46:19,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:19,669 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 14:46:19,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:19,669 INFO L85 PathProgramCache]: Analyzing trace with hash 160062431, now seen corresponding path program 6 times [2022-01-18 14:46:19,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:19,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665397130] [2022-01-18 14:46:19,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:19,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:19,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:19,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:19,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665397130] [2022-01-18 14:46:19,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665397130] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:19,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981023064] [2022-01-18 14:46:19,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:46:19,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:19,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:19,689 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 14:46:19,693 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 14:46:19,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 14:46:19,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:46:19,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:46:19,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:19,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:19,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:19,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:19,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981023064] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:19,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:19,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-01-18 14:46:19,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620555327] [2022-01-18 14:46:19,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:19,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:46:19,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:19,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:46:19,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:46:19,806 INFO L87 Difference]: Start difference. First operand 10587 states and 46225 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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 14:46:20,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:20,054 INFO L93 Difference]: Finished difference Result 13469 states and 56467 transitions. [2022-01-18 14:46:20,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:46:20,055 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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 25 [2022-01-18 14:46:20,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:20,095 INFO L225 Difference]: With dead ends: 13469 [2022-01-18 14:46:20,095 INFO L226 Difference]: Without dead ends: 13444 [2022-01-18 14:46:20,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:46:20,096 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 105 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:20,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 213 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:46:20,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13444 states. [2022-01-18 14:46:20,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13444 to 10653. [2022-01-18 14:46:20,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10653 states, 10652 states have (on average 4.361997746901991) internal successors, (46464), 10652 states have internal predecessors, (46464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:20,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10653 states to 10653 states and 46464 transitions. [2022-01-18 14:46:20,397 INFO L78 Accepts]: Start accepts. Automaton has 10653 states and 46464 transitions. Word has length 25 [2022-01-18 14:46:20,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:20,397 INFO L470 AbstractCegarLoop]: Abstraction has 10653 states and 46464 transitions. [2022-01-18 14:46:20,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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 14:46:20,398 INFO L276 IsEmpty]: Start isEmpty. Operand 10653 states and 46464 transitions. [2022-01-18 14:46:20,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:46:20,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:20,425 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:46:20,441 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 14:46:20,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:20,627 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 14:46:20,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:20,627 INFO L85 PathProgramCache]: Analyzing trace with hash -309349743, now seen corresponding path program 7 times [2022-01-18 14:46:20,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:20,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575227851] [2022-01-18 14:46:20,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:20,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:20,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:20,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:20,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:20,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575227851] [2022-01-18 14:46:20,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575227851] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:20,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577326391] [2022-01-18 14:46:20,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:46:20,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:20,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:20,651 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 14:46:20,660 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 14:46:20,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:20,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:46:20,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:20,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:20,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:20,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:46:20,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577326391] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:20,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:20,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-01-18 14:46:20,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243556090] [2022-01-18 14:46:20,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:20,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:46:20,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:20,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:46:20,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:46:20,784 INFO L87 Difference]: Start difference. First operand 10653 states and 46464 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 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 14:46:21,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:21,170 INFO L93 Difference]: Finished difference Result 23056 states and 98319 transitions. [2022-01-18 14:46:21,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 14:46:21,172 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 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 25 [2022-01-18 14:46:21,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:21,251 INFO L225 Difference]: With dead ends: 23056 [2022-01-18 14:46:21,251 INFO L226 Difference]: Without dead ends: 23056 [2022-01-18 14:46:21,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:46:21,252 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 216 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:21,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 140 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:46:21,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23056 states. [2022-01-18 14:46:21,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23056 to 14095. [2022-01-18 14:46:21,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14095 states, 14094 states have (on average 4.5) internal successors, (63423), 14094 states have internal predecessors, (63423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:21,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14095 states to 14095 states and 63423 transitions. [2022-01-18 14:46:21,799 INFO L78 Accepts]: Start accepts. Automaton has 14095 states and 63423 transitions. Word has length 25 [2022-01-18 14:46:21,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:21,799 INFO L470 AbstractCegarLoop]: Abstraction has 14095 states and 63423 transitions. [2022-01-18 14:46:21,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 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 14:46:21,799 INFO L276 IsEmpty]: Start isEmpty. Operand 14095 states and 63423 transitions. [2022-01-18 14:46:21,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:46:21,852 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:21,852 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:46:21,868 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 14:46:22,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:22,059 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 14:46:22,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:22,060 INFO L85 PathProgramCache]: Analyzing trace with hash -547313135, now seen corresponding path program 8 times [2022-01-18 14:46:22,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:22,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229382932] [2022-01-18 14:46:22,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:22,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:22,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:22,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:22,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:22,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229382932] [2022-01-18 14:46:22,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229382932] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:22,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58429739] [2022-01-18 14:46:22,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:46:22,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:22,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:22,088 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 14:46:22,091 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 14:46:22,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:46:22,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:46:22,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:46:22,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:22,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:22,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:22,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:46:22,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58429739] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:22,199 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:22,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-01-18 14:46:22,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667088469] [2022-01-18 14:46:22,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:22,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:46:22,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:22,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:46:22,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:46:22,200 INFO L87 Difference]: Start difference. First operand 14095 states and 63423 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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 14:46:22,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:22,542 INFO L93 Difference]: Finished difference Result 18427 states and 79299 transitions. [2022-01-18 14:46:22,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:46:22,542 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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 25 [2022-01-18 14:46:22,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:22,600 INFO L225 Difference]: With dead ends: 18427 [2022-01-18 14:46:22,600 INFO L226 Difference]: Without dead ends: 18403 [2022-01-18 14:46:22,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-01-18 14:46:22,601 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 140 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:22,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 200 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:46:22,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18403 states. [2022-01-18 14:46:22,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18403 to 14093. [2022-01-18 14:46:22,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14093 states, 14092 states have (on average 4.498864604030656) internal successors, (63398), 14092 states have internal predecessors, (63398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:22,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14093 states to 14093 states and 63398 transitions. [2022-01-18 14:46:22,976 INFO L78 Accepts]: Start accepts. Automaton has 14093 states and 63398 transitions. Word has length 25 [2022-01-18 14:46:22,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:22,976 INFO L470 AbstractCegarLoop]: Abstraction has 14093 states and 63398 transitions. [2022-01-18 14:46:22,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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 14:46:22,976 INFO L276 IsEmpty]: Start isEmpty. Operand 14093 states and 63398 transitions. [2022-01-18 14:46:23,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:46:23,011 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:23,011 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:46:23,027 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 14:46:23,212 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,SelfDestructingSolverStorable26 [2022-01-18 14:46:23,212 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 14:46:23,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:23,212 INFO L85 PathProgramCache]: Analyzing trace with hash 2067157521, now seen corresponding path program 9 times [2022-01-18 14:46:23,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:23,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789312630] [2022-01-18 14:46:23,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:23,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:23,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:23,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:23,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:23,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789312630] [2022-01-18 14:46:23,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789312630] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:23,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164479996] [2022-01-18 14:46:23,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:46:23,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:23,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:23,238 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 14:46:23,239 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 14:46:23,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:46:23,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:46:23,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:46:23,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:23,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:23,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:46:23,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164479996] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:23,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:23,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-01-18 14:46:23,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429620076] [2022-01-18 14:46:23,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:23,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:46:23,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:23,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:46:23,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:46:23,361 INFO L87 Difference]: Start difference. First operand 14093 states and 63398 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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 14:46:23,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:23,799 INFO L93 Difference]: Finished difference Result 21428 states and 91981 transitions. [2022-01-18 14:46:23,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:46:23,799 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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 25 [2022-01-18 14:46:23,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:23,875 INFO L225 Difference]: With dead ends: 21428 [2022-01-18 14:46:23,875 INFO L226 Difference]: Without dead ends: 21428 [2022-01-18 14:46:23,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:46:23,876 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 193 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:23,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 187 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:46:23,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21428 states. [2022-01-18 14:46:24,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21428 to 14369. [2022-01-18 14:46:24,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14369 states, 14368 states have (on average 4.502227171492205) internal successors, (64688), 14368 states have internal predecessors, (64688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:24,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14369 states to 14369 states and 64688 transitions. [2022-01-18 14:46:24,364 INFO L78 Accepts]: Start accepts. Automaton has 14369 states and 64688 transitions. Word has length 25 [2022-01-18 14:46:24,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:24,364 INFO L470 AbstractCegarLoop]: Abstraction has 14369 states and 64688 transitions. [2022-01-18 14:46:24,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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 14:46:24,364 INFO L276 IsEmpty]: Start isEmpty. Operand 14369 states and 64688 transitions. [2022-01-18 14:46:24,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:46:24,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:24,397 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:46:24,412 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 14:46:24,597 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,SelfDestructingSolverStorable27 [2022-01-18 14:46:24,597 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 14:46:24,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:24,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1238343095, now seen corresponding path program 10 times [2022-01-18 14:46:24,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:24,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307935975] [2022-01-18 14:46:24,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:24,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:24,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:24,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:24,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307935975] [2022-01-18 14:46:24,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307935975] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:24,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976383863] [2022-01-18 14:46:24,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:46:24,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:24,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:24,623 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 14:46:24,624 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 14:46:24,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:46:24,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:46:24,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:46:24,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:24,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:24,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:24,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:46:24,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976383863] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:24,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:24,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-01-18 14:46:24,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488512784] [2022-01-18 14:46:24,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:24,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:46:24,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:24,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:46:24,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:46:24,740 INFO L87 Difference]: Start difference. First operand 14369 states and 64688 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 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 14:46:25,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:25,042 INFO L93 Difference]: Finished difference Result 21976 states and 93132 transitions. [2022-01-18 14:46:25,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 14:46:25,042 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 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 25 [2022-01-18 14:46:25,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:25,118 INFO L225 Difference]: With dead ends: 21976 [2022-01-18 14:46:25,118 INFO L226 Difference]: Without dead ends: 21951 [2022-01-18 14:46:25,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-01-18 14:46:25,120 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 207 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:25,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 155 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:46:25,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21951 states. [2022-01-18 14:46:25,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21951 to 14371. [2022-01-18 14:46:25,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14371 states, 14370 states have (on average 4.501530967292972) internal successors, (64687), 14370 states have internal predecessors, (64687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:25,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14371 states to 14371 states and 64687 transitions. [2022-01-18 14:46:25,589 INFO L78 Accepts]: Start accepts. Automaton has 14371 states and 64687 transitions. Word has length 25 [2022-01-18 14:46:25,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:25,589 INFO L470 AbstractCegarLoop]: Abstraction has 14371 states and 64687 transitions. [2022-01-18 14:46:25,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 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 14:46:25,589 INFO L276 IsEmpty]: Start isEmpty. Operand 14371 states and 64687 transitions. [2022-01-18 14:46:25,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:46:25,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:25,731 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:46:25,745 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 14:46:25,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 14:46:25,931 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 14:46:25,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:25,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1192902861, now seen corresponding path program 11 times [2022-01-18 14:46:25,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:25,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494305975] [2022-01-18 14:46:25,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:25,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:25,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:25,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:25,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:25,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494305975] [2022-01-18 14:46:25,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494305975] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:25,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047564388] [2022-01-18 14:46:25,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:46:25,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:25,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:25,959 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 14:46:25,959 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 14:46:25,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:46:25,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:46:25,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:46:25,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:26,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:26,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:26,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:26,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047564388] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:26,064 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:26,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-01-18 14:46:26,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261782231] [2022-01-18 14:46:26,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:26,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:46:26,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:26,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:46:26,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:46:26,065 INFO L87 Difference]: Start difference. First operand 14371 states and 64687 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 14:46:26,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:26,512 INFO L93 Difference]: Finished difference Result 23394 states and 101370 transitions. [2022-01-18 14:46:26,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 14:46:26,513 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 14:46:26,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:26,591 INFO L225 Difference]: With dead ends: 23394 [2022-01-18 14:46:26,592 INFO L226 Difference]: Without dead ends: 23394 [2022-01-18 14:46:26,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:46:26,592 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 165 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:26,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 214 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:46:26,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23394 states. [2022-01-18 14:46:27,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23394 to 15994. [2022-01-18 14:46:27,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15994 states, 15993 states have (on average 4.474832739323454) internal successors, (71566), 15993 states have internal predecessors, (71566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:27,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15994 states to 15994 states and 71566 transitions. [2022-01-18 14:46:27,122 INFO L78 Accepts]: Start accepts. Automaton has 15994 states and 71566 transitions. Word has length 25 [2022-01-18 14:46:27,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:27,122 INFO L470 AbstractCegarLoop]: Abstraction has 15994 states and 71566 transitions. [2022-01-18 14:46:27,122 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 14:46:27,122 INFO L276 IsEmpty]: Start isEmpty. Operand 15994 states and 71566 transitions. [2022-01-18 14:46:27,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 14:46:27,162 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:27,162 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:46:27,180 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 14:46:27,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:27,362 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 14:46:27,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:27,363 INFO L85 PathProgramCache]: Analyzing trace with hash 2059167099, now seen corresponding path program 12 times [2022-01-18 14:46:27,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:27,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560212315] [2022-01-18 14:46:27,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:27,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:27,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:27,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:27,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560212315] [2022-01-18 14:46:27,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560212315] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:27,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309942069] [2022-01-18 14:46:27,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:46:27,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:27,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:27,391 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 14:46:27,392 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 14:46:27,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:46:27,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:46:27,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 14:46:27,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:27,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:27,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:27,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:27,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309942069] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:27,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:27,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-01-18 14:46:27,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390435222] [2022-01-18 14:46:27,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:27,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:46:27,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:27,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:46:27,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:46:27,518 INFO L87 Difference]: Start difference. First operand 15994 states and 71566 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 14:46:27,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:27,865 INFO L93 Difference]: Finished difference Result 23161 states and 98055 transitions. [2022-01-18 14:46:27,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 14:46:27,866 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 14:46:27,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:28,090 INFO L225 Difference]: With dead ends: 23161 [2022-01-18 14:46:28,090 INFO L226 Difference]: Without dead ends: 23070 [2022-01-18 14:46:28,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 3 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 14:46:28,100 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 216 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:28,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 144 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:46:28,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23070 states. [2022-01-18 14:46:28,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23070 to 16749. [2022-01-18 14:46:28,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16749 states, 16748 states have (on average 4.4525316455696204) internal successors, (74571), 16748 states have internal predecessors, (74571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:28,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16749 states to 16749 states and 74571 transitions. [2022-01-18 14:46:28,612 INFO L78 Accepts]: Start accepts. Automaton has 16749 states and 74571 transitions. Word has length 25 [2022-01-18 14:46:28,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:28,612 INFO L470 AbstractCegarLoop]: Abstraction has 16749 states and 74571 transitions. [2022-01-18 14:46:28,612 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 14:46:28,612 INFO L276 IsEmpty]: Start isEmpty. Operand 16749 states and 74571 transitions. [2022-01-18 14:46:28,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:46:28,648 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:28,648 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:46:28,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 14:46:28,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:28,849 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 14:46:28,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:28,850 INFO L85 PathProgramCache]: Analyzing trace with hash -818219675, now seen corresponding path program 13 times [2022-01-18 14:46:28,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:28,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725278858] [2022-01-18 14:46:28,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:28,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:28,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:28,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:28,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725278858] [2022-01-18 14:46:28,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725278858] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:28,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461296052] [2022-01-18 14:46:28,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:46:28,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:28,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:28,892 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 14:46:28,893 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 14:46:28,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:28,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:46:28,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:29,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:29,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:29,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:29,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461296052] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:29,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:29,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 6 [2022-01-18 14:46:29,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041131599] [2022-01-18 14:46:29,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:29,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:46:29,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:29,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:46:29,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:46:29,241 INFO L87 Difference]: Start difference. First operand 16749 states and 74571 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 14:46:29,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:29,500 INFO L93 Difference]: Finished difference Result 18350 states and 80380 transitions. [2022-01-18 14:46:29,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:46:29,500 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 27 [2022-01-18 14:46:29,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:29,552 INFO L225 Difference]: With dead ends: 18350 [2022-01-18 14:46:29,552 INFO L226 Difference]: Without dead ends: 18282 [2022-01-18 14:46:29,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:46:29,553 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 71 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:29,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 91 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:46:29,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18282 states. [2022-01-18 14:46:29,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18282 to 17368. [2022-01-18 14:46:29,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17368 states, 17367 states have (on average 4.438244947313871) internal successors, (77079), 17367 states have internal predecessors, (77079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:29,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17368 states to 17368 states and 77079 transitions. [2022-01-18 14:46:29,970 INFO L78 Accepts]: Start accepts. Automaton has 17368 states and 77079 transitions. Word has length 27 [2022-01-18 14:46:29,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:29,970 INFO L470 AbstractCegarLoop]: Abstraction has 17368 states and 77079 transitions. [2022-01-18 14:46:29,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 14:46:29,970 INFO L276 IsEmpty]: Start isEmpty. Operand 17368 states and 77079 transitions. [2022-01-18 14:46:30,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:46:30,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:30,005 INFO L514 BasicCegarLoop]: trace histogram [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 14:46:30,020 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 14:46:30,205 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,SelfDestructingSolverStorable31 [2022-01-18 14:46:30,205 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 14:46:30,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:30,206 INFO L85 PathProgramCache]: Analyzing trace with hash -850989663, now seen corresponding path program 14 times [2022-01-18 14:46:30,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:30,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034703884] [2022-01-18 14:46:30,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:30,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:46:30,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:30,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034703884] [2022-01-18 14:46:30,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034703884] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:30,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569268273] [2022-01-18 14:46:30,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:46:30,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:30,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:30,260 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 14:46:30,261 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 14:46:30,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:46:30,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:46:30,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:46:30,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:30,553 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:30,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:30,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:46:30,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569268273] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:30,785 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:30,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 7 [2022-01-18 14:46:30,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235749884] [2022-01-18 14:46:30,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:30,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:46:30,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:30,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:46:30,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:46:30,786 INFO L87 Difference]: Start difference. First operand 17368 states and 77079 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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 14:46:31,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:31,146 INFO L93 Difference]: Finished difference Result 19060 states and 83209 transitions. [2022-01-18 14:46:31,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 14:46:31,146 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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 27 [2022-01-18 14:46:31,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:31,219 INFO L225 Difference]: With dead ends: 19060 [2022-01-18 14:46:31,219 INFO L226 Difference]: Without dead ends: 18924 [2022-01-18 14:46:31,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 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 14:46:31,220 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 88 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:31,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 106 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:46:31,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18924 states. [2022-01-18 14:46:31,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18924 to 17614. [2022-01-18 14:46:31,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17614 states, 17613 states have (on average 4.438199057514336) internal successors, (78170), 17613 states have internal predecessors, (78170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:31,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17614 states to 17614 states and 78170 transitions. [2022-01-18 14:46:31,808 INFO L78 Accepts]: Start accepts. Automaton has 17614 states and 78170 transitions. Word has length 27 [2022-01-18 14:46:31,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:31,808 INFO L470 AbstractCegarLoop]: Abstraction has 17614 states and 78170 transitions. [2022-01-18 14:46:31,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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 14:46:31,808 INFO L276 IsEmpty]: Start isEmpty. Operand 17614 states and 78170 transitions. [2022-01-18 14:46:31,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:46:31,847 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:31,847 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, 1, 1] [2022-01-18 14:46:31,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-01-18 14:46:32,047 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,SelfDestructingSolverStorable32 [2022-01-18 14:46:32,047 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 14:46:32,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:32,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1826966111, now seen corresponding path program 1 times [2022-01-18 14:46:32,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:32,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019991013] [2022-01-18 14:46:32,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:32,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:32,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:32,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:32,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:32,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019991013] [2022-01-18 14:46:32,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019991013] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:32,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436079986] [2022-01-18 14:46:32,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:32,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:32,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:32,116 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 14:46:32,131 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 14:46:32,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:32,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:46:32,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:32,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:32,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:32,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:32,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436079986] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:32,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:32,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 7 [2022-01-18 14:46:32,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203620257] [2022-01-18 14:46:32,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:32,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:46:32,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:32,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:46:32,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:46:32,507 INFO L87 Difference]: Start difference. First operand 17614 states and 78170 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 14:46:32,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:32,819 INFO L93 Difference]: Finished difference Result 18637 states and 81676 transitions. [2022-01-18 14:46:32,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 14:46:32,819 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 27 [2022-01-18 14:46:32,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:32,881 INFO L225 Difference]: With dead ends: 18637 [2022-01-18 14:46:32,882 INFO L226 Difference]: Without dead ends: 18269 [2022-01-18 14:46:32,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 9 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:46:32,883 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 54 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:32,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 105 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:46:32,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18269 states. [2022-01-18 14:46:33,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18269 to 17885. [2022-01-18 14:46:33,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17885 states, 17884 states have (on average 4.4198165958398565) internal successors, (79044), 17884 states have internal predecessors, (79044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:33,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17885 states to 17885 states and 79044 transitions. [2022-01-18 14:46:33,395 INFO L78 Accepts]: Start accepts. Automaton has 17885 states and 79044 transitions. Word has length 27 [2022-01-18 14:46:33,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:33,396 INFO L470 AbstractCegarLoop]: Abstraction has 17885 states and 79044 transitions. [2022-01-18 14:46:33,396 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 14:46:33,396 INFO L276 IsEmpty]: Start isEmpty. Operand 17885 states and 79044 transitions. [2022-01-18 14:46:33,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:46:33,433 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:33,433 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, 1, 1] [2022-01-18 14:46:33,447 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 14:46:33,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:33,635 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 14:46:33,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:33,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1766241133, now seen corresponding path program 2 times [2022-01-18 14:46:33,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:33,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481531243] [2022-01-18 14:46:33,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:33,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:33,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:46:33,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:33,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481531243] [2022-01-18 14:46:33,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481531243] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:33,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909180277] [2022-01-18 14:46:33,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:46:33,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:33,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:33,685 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 14:46:33,685 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 14:46:33,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:46:33,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:46:33,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:46:33,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:33,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:34,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:46:34,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909180277] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:34,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:34,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 7 [2022-01-18 14:46:34,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904806203] [2022-01-18 14:46:34,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:34,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:46:34,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:34,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:46:34,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:46:34,038 INFO L87 Difference]: Start difference. First operand 17885 states and 79044 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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 14:46:34,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:34,430 INFO L93 Difference]: Finished difference Result 18717 states and 81967 transitions. [2022-01-18 14:46:34,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 14:46:34,430 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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 27 [2022-01-18 14:46:34,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:34,497 INFO L225 Difference]: With dead ends: 18717 [2022-01-18 14:46:34,497 INFO L226 Difference]: Without dead ends: 18403 [2022-01-18 14:46:34,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 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 14:46:34,498 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:34,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 81 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:46:34,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18403 states. [2022-01-18 14:46:34,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18403 to 17947. [2022-01-18 14:46:34,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17947 states, 17946 states have (on average 4.425554441101081) internal successors, (79421), 17946 states have internal predecessors, (79421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:34,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17947 states to 17947 states and 79421 transitions. [2022-01-18 14:46:34,834 INFO L78 Accepts]: Start accepts. Automaton has 17947 states and 79421 transitions. Word has length 27 [2022-01-18 14:46:34,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:34,834 INFO L470 AbstractCegarLoop]: Abstraction has 17947 states and 79421 transitions. [2022-01-18 14:46:34,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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 14:46:34,835 INFO L276 IsEmpty]: Start isEmpty. Operand 17947 states and 79421 transitions. [2022-01-18 14:46:34,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:46:34,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:34,870 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, 1, 1] [2022-01-18 14:46:34,885 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 14:46:35,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:35,071 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 14:46:35,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:35,071 INFO L85 PathProgramCache]: Analyzing trace with hash -29963743, now seen corresponding path program 3 times [2022-01-18 14:46:35,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:35,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112133319] [2022-01-18 14:46:35,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:35,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:35,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:35,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:46:35,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:35,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112133319] [2022-01-18 14:46:35,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112133319] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:35,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427106216] [2022-01-18 14:46:35,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:46:35,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:35,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:35,131 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 14:46:35,131 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 14:46:35,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:46:35,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:46:35,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:46:35,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:35,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:35,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:35,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:46:35,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427106216] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:35,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:35,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 6 [2022-01-18 14:46:35,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842667994] [2022-01-18 14:46:35,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:35,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:46:35,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:35,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:46:35,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:46:35,728 INFO L87 Difference]: Start difference. First operand 17947 states and 79421 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 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 14:46:36,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:36,056 INFO L93 Difference]: Finished difference Result 18527 states and 81623 transitions. [2022-01-18 14:46:36,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:46:36,057 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 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 27 [2022-01-18 14:46:36,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:36,119 INFO L225 Difference]: With dead ends: 18527 [2022-01-18 14:46:36,119 INFO L226 Difference]: Without dead ends: 18379 [2022-01-18 14:46:36,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 10 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:46:36,120 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:36,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 82 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:46:36,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18379 states. [2022-01-18 14:46:36,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18379 to 18247. [2022-01-18 14:46:36,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18247 states, 18246 states have (on average 4.422942014688151) internal successors, (80701), 18246 states have internal predecessors, (80701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:36,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18247 states to 18247 states and 80701 transitions. [2022-01-18 14:46:36,679 INFO L78 Accepts]: Start accepts. Automaton has 18247 states and 80701 transitions. Word has length 27 [2022-01-18 14:46:36,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:36,679 INFO L470 AbstractCegarLoop]: Abstraction has 18247 states and 80701 transitions. [2022-01-18 14:46:36,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 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 14:46:36,679 INFO L276 IsEmpty]: Start isEmpty. Operand 18247 states and 80701 transitions. [2022-01-18 14:46:36,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:46:36,715 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:36,715 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, 1, 1] [2022-01-18 14:46:36,730 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 14:46:36,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:36,931 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 14:46:36,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:36,931 INFO L85 PathProgramCache]: Analyzing trace with hash 175276469, now seen corresponding path program 4 times [2022-01-18 14:46:36,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:36,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770442738] [2022-01-18 14:46:36,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:36,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:36,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:36,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770442738] [2022-01-18 14:46:36,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770442738] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:36,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092493491] [2022-01-18 14:46:36,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:46:36,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:36,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:36,991 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 14:46:36,992 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 14:46:37,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:46:37,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:46:37,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:46:37,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:37,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:37,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:37,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092493491] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:37,371 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:37,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 7 [2022-01-18 14:46:37,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272063891] [2022-01-18 14:46:37,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:37,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:46:37,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:37,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:46:37,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:46:37,372 INFO L87 Difference]: Start difference. First operand 18247 states and 80701 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 14:46:37,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:37,673 INFO L93 Difference]: Finished difference Result 19257 states and 84104 transitions. [2022-01-18 14:46:37,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 14:46:37,673 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 27 [2022-01-18 14:46:37,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:37,729 INFO L225 Difference]: With dead ends: 19257 [2022-01-18 14:46:37,729 INFO L226 Difference]: Without dead ends: 18829 [2022-01-18 14:46:37,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 9 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:46:37,729 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 58 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:37,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 105 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:46:37,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18829 states. [2022-01-18 14:46:38,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18829 to 17865. [2022-01-18 14:46:38,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17865 states, 17864 states have (on average 4.420286609941782) internal successors, (78964), 17864 states have internal predecessors, (78964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:38,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17865 states to 17865 states and 78964 transitions. [2022-01-18 14:46:38,204 INFO L78 Accepts]: Start accepts. Automaton has 17865 states and 78964 transitions. Word has length 27 [2022-01-18 14:46:38,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:38,204 INFO L470 AbstractCegarLoop]: Abstraction has 17865 states and 78964 transitions. [2022-01-18 14:46:38,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 14:46:38,204 INFO L276 IsEmpty]: Start isEmpty. Operand 17865 states and 78964 transitions. [2022-01-18 14:46:38,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:46:38,241 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:38,241 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, 1, 1] [2022-01-18 14:46:38,256 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 14:46:38,449 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,SelfDestructingSolverStorable36 [2022-01-18 14:46:38,449 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 14:46:38,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:38,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1757100517, now seen corresponding path program 5 times [2022-01-18 14:46:38,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:38,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789211428] [2022-01-18 14:46:38,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:38,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:38,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:38,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:38,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:38,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789211428] [2022-01-18 14:46:38,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789211428] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:38,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162190486] [2022-01-18 14:46:38,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:46:38,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:38,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:38,511 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 14:46:38,511 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 14:46:38,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:46:38,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:46:38,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:46:38,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:38,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:38,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:38,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:38,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162190486] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:38,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:38,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 6 [2022-01-18 14:46:38,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084964571] [2022-01-18 14:46:38,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:38,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:46:38,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:38,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:46:38,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:46:38,897 INFO L87 Difference]: Start difference. First operand 17865 states and 78964 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 14:46:39,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:39,124 INFO L93 Difference]: Finished difference Result 18645 states and 81768 transitions. [2022-01-18 14:46:39,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:46:39,124 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 27 [2022-01-18 14:46:39,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:39,180 INFO L225 Difference]: With dead ends: 18645 [2022-01-18 14:46:39,180 INFO L226 Difference]: Without dead ends: 18497 [2022-01-18 14:46:39,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 10 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:46:39,181 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:39,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 65 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:46:39,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18497 states. [2022-01-18 14:46:39,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18497 to 18081. [2022-01-18 14:46:39,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18081 states, 18080 states have (on average 4.419358407079646) internal successors, (79902), 18080 states have internal predecessors, (79902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:39,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18081 states to 18081 states and 79902 transitions. [2022-01-18 14:46:39,662 INFO L78 Accepts]: Start accepts. Automaton has 18081 states and 79902 transitions. Word has length 27 [2022-01-18 14:46:39,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:39,662 INFO L470 AbstractCegarLoop]: Abstraction has 18081 states and 79902 transitions. [2022-01-18 14:46:39,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 14:46:39,662 INFO L276 IsEmpty]: Start isEmpty. Operand 18081 states and 79902 transitions. [2022-01-18 14:46:39,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:46:39,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:39,699 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, 1, 1] [2022-01-18 14:46:39,714 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 14:46:39,899 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,SelfDestructingSolverStorable37 [2022-01-18 14:46:39,899 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 14:46:39,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:39,900 INFO L85 PathProgramCache]: Analyzing trace with hash -332468451, now seen corresponding path program 6 times [2022-01-18 14:46:39,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:39,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371480242] [2022-01-18 14:46:39,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:39,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:39,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:39,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:46:39,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:39,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371480242] [2022-01-18 14:46:39,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371480242] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:39,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678555509] [2022-01-18 14:46:39,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:46:39,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:39,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:39,954 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 14:46:39,955 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 14:46:39,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 14:46:39,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:46:39,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:46:39,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:40,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:40,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:40,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:46:40,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678555509] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:40,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:40,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 7 [2022-01-18 14:46:40,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988760568] [2022-01-18 14:46:40,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:40,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:46:40,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:40,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:46:40,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:46:40,320 INFO L87 Difference]: Start difference. First operand 18081 states and 79902 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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 14:46:40,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:40,738 INFO L93 Difference]: Finished difference Result 19216 states and 83740 transitions. [2022-01-18 14:46:40,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 14:46:40,738 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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 27 [2022-01-18 14:46:40,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:40,797 INFO L225 Difference]: With dead ends: 19216 [2022-01-18 14:46:40,797 INFO L226 Difference]: Without dead ends: 18872 [2022-01-18 14:46:40,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 9 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:46:40,798 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 50 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:40,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 107 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:46:40,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18872 states. [2022-01-18 14:46:41,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18872 to 18104. [2022-01-18 14:46:41,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18104 states, 18103 states have (on average 4.404131911837817) internal successors, (79728), 18103 states have internal predecessors, (79728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:41,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18104 states to 18104 states and 79728 transitions. [2022-01-18 14:46:41,239 INFO L78 Accepts]: Start accepts. Automaton has 18104 states and 79728 transitions. Word has length 27 [2022-01-18 14:46:41,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:41,239 INFO L470 AbstractCegarLoop]: Abstraction has 18104 states and 79728 transitions. [2022-01-18 14:46:41,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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 14:46:41,240 INFO L276 IsEmpty]: Start isEmpty. Operand 18104 states and 79728 transitions. [2022-01-18 14:46:41,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:46:41,281 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:41,281 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, 1, 1] [2022-01-18 14:46:41,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-01-18 14:46:41,481 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,SelfDestructingSolverStorable38 [2022-01-18 14:46:41,481 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 14:46:41,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:41,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1609977505, now seen corresponding path program 7 times [2022-01-18 14:46:41,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:41,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033370486] [2022-01-18 14:46:41,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:41,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:41,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:41,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 14:46:41,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:41,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033370486] [2022-01-18 14:46:41,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033370486] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:46:41,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:46:41,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 14:46:41,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035906521] [2022-01-18 14:46:41,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:46:41,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 14:46:41,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:41,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 14:46:41,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 14:46:41,531 INFO L87 Difference]: Start difference. First operand 18104 states and 79728 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:41,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:41,809 INFO L93 Difference]: Finished difference Result 18918 states and 82588 transitions. [2022-01-18 14:46:41,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 14:46:41,809 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 14:46:41,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:41,864 INFO L225 Difference]: With dead ends: 18918 [2022-01-18 14:46:41,864 INFO L226 Difference]: Without dead ends: 18720 [2022-01-18 14:46:41,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 2 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 14:46:41,865 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:41,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 39 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:46:41,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18720 states. [2022-01-18 14:46:42,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18720 to 18128. [2022-01-18 14:46:42,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18128 states, 18127 states have (on average 4.411871793457274) internal successors, (79974), 18127 states have internal predecessors, (79974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:42,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18128 states to 18128 states and 79974 transitions. [2022-01-18 14:46:42,230 INFO L78 Accepts]: Start accepts. Automaton has 18128 states and 79974 transitions. Word has length 27 [2022-01-18 14:46:42,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:42,230 INFO L470 AbstractCegarLoop]: Abstraction has 18128 states and 79974 transitions. [2022-01-18 14:46:42,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:42,230 INFO L276 IsEmpty]: Start isEmpty. Operand 18128 states and 79974 transitions. [2022-01-18 14:46:42,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:46:42,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:42,269 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, 1, 1] [2022-01-18 14:46:42,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-18 14:46:42,269 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 14:46:42,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:42,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1434619345, now seen corresponding path program 8 times [2022-01-18 14:46:42,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:42,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191166407] [2022-01-18 14:46:42,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:42,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:42,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:42,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:46:42,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:42,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191166407] [2022-01-18 14:46:42,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191166407] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:42,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962841933] [2022-01-18 14:46:42,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:46:42,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:42,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:42,325 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 14:46:42,326 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 14:46:42,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:46:42,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:46:42,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:46:42,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:42,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:42,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:46:42,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962841933] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:42,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:42,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 6 [2022-01-18 14:46:42,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731717866] [2022-01-18 14:46:42,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:42,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:46:42,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:42,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:46:42,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:46:42,674 INFO L87 Difference]: Start difference. First operand 18128 states and 79974 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 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 14:46:43,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:43,001 INFO L93 Difference]: Finished difference Result 18732 states and 82218 transitions. [2022-01-18 14:46:43,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:46:43,001 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 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 27 [2022-01-18 14:46:43,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:43,055 INFO L225 Difference]: With dead ends: 18732 [2022-01-18 14:46:43,056 INFO L226 Difference]: Without dead ends: 18600 [2022-01-18 14:46:43,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 10 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:46:43,056 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:43,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 73 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:46:43,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18600 states. [2022-01-18 14:46:43,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18600 to 18396. [2022-01-18 14:46:43,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18396 states, 18395 states have (on average 4.410220168524056) internal successors, (81126), 18395 states have internal predecessors, (81126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:43,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18396 states to 18396 states and 81126 transitions. [2022-01-18 14:46:43,415 INFO L78 Accepts]: Start accepts. Automaton has 18396 states and 81126 transitions. Word has length 27 [2022-01-18 14:46:43,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:43,415 INFO L470 AbstractCegarLoop]: Abstraction has 18396 states and 81126 transitions. [2022-01-18 14:46:43,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 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 14:46:43,415 INFO L276 IsEmpty]: Start isEmpty. Operand 18396 states and 81126 transitions. [2022-01-18 14:46:43,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:46:43,452 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:43,452 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, 1, 1] [2022-01-18 14:46:43,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-18 14:46:43,652 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 14:46:43,653 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 14:46:43,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:43,653 INFO L85 PathProgramCache]: Analyzing trace with hash 769255917, now seen corresponding path program 9 times [2022-01-18 14:46:43,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:43,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367119737] [2022-01-18 14:46:43,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:43,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:43,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:46:43,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:43,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367119737] [2022-01-18 14:46:43,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367119737] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:43,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244191769] [2022-01-18 14:46:43,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:46:43,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:43,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:43,719 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 14:46:43,719 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 14:46:43,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:46:43,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:46:43,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:46:43,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:43,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:44,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:46:44,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244191769] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:44,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:44,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 7 [2022-01-18 14:46:44,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506220864] [2022-01-18 14:46:44,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:44,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:46:44,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:44,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:46:44,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:46:44,175 INFO L87 Difference]: Start difference. First operand 18396 states and 81126 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 14:46:44,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:44,514 INFO L93 Difference]: Finished difference Result 19604 states and 85164 transitions. [2022-01-18 14:46:44,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 14:46:44,514 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 27 [2022-01-18 14:46:44,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:44,572 INFO L225 Difference]: With dead ends: 19604 [2022-01-18 14:46:44,572 INFO L226 Difference]: Without dead ends: 19208 [2022-01-18 14:46:44,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 9 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:46:44,573 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 55 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:44,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 119 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:46:44,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19208 states. [2022-01-18 14:46:44,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19208 to 18044. [2022-01-18 14:46:44,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18044 states, 18043 states have (on average 4.406916809843152) internal successors, (79514), 18043 states have internal predecessors, (79514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:44,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18044 states to 18044 states and 79514 transitions. [2022-01-18 14:46:44,952 INFO L78 Accepts]: Start accepts. Automaton has 18044 states and 79514 transitions. Word has length 27 [2022-01-18 14:46:44,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:44,952 INFO L470 AbstractCegarLoop]: Abstraction has 18044 states and 79514 transitions. [2022-01-18 14:46:44,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 14:46:44,952 INFO L276 IsEmpty]: Start isEmpty. Operand 18044 states and 79514 transitions. [2022-01-18 14:46:44,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:46:44,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:44,990 INFO L514 BasicCegarLoop]: trace histogram [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 14:46:45,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-01-18 14:46:45,190 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 14:46:45,190 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 14:46:45,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:45,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1784277025, now seen corresponding path program 15 times [2022-01-18 14:46:45,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:45,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457591985] [2022-01-18 14:46:45,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:45,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:45,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:45,231 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:46:45,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:45,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457591985] [2022-01-18 14:46:45,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457591985] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:45,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210415751] [2022-01-18 14:46:45,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:46:45,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:45,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:45,233 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 14:46:45,233 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 14:46:45,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:46:45,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:46:45,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:46:45,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:45,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:45,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:45,549 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:46:45,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210415751] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:45,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:45,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 6 [2022-01-18 14:46:45,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290996330] [2022-01-18 14:46:45,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:45,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:46:45,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:45,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:46:45,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:46:45,550 INFO L87 Difference]: Start difference. First operand 18044 states and 79514 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 14:46:45,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:45,806 INFO L93 Difference]: Finished difference Result 19592 states and 85134 transitions. [2022-01-18 14:46:45,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:46:45,806 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 27 [2022-01-18 14:46:45,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:45,875 INFO L225 Difference]: With dead ends: 19592 [2022-01-18 14:46:45,875 INFO L226 Difference]: Without dead ends: 19524 [2022-01-18 14:46:45,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:46:45,876 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:45,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 79 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:46:45,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19524 states. [2022-01-18 14:46:46,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19524 to 18554. [2022-01-18 14:46:46,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18554 states, 18553 states have (on average 4.396647442462135) internal successors, (81571), 18553 states have internal predecessors, (81571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:46,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18554 states to 18554 states and 81571 transitions. [2022-01-18 14:46:46,294 INFO L78 Accepts]: Start accepts. Automaton has 18554 states and 81571 transitions. Word has length 27 [2022-01-18 14:46:46,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:46,295 INFO L470 AbstractCegarLoop]: Abstraction has 18554 states and 81571 transitions. [2022-01-18 14:46:46,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 14:46:46,295 INFO L276 IsEmpty]: Start isEmpty. Operand 18554 states and 81571 transitions. [2022-01-18 14:46:46,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:46:46,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:46,331 INFO L514 BasicCegarLoop]: trace histogram [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 14:46:46,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-01-18 14:46:46,531 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 14:46:46,531 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 14:46:46,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:46,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1862975263, now seen corresponding path program 13 times [2022-01-18 14:46:46,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:46,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588784377] [2022-01-18 14:46:46,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:46,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:46,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:46,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:46,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:46,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588784377] [2022-01-18 14:46:46,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588784377] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:46,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701586494] [2022-01-18 14:46:46,576 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:46:46,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:46,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:46,577 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 14:46:46,578 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 14:46:46,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:46,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:46:46,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:46,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:46,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:46,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:46,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701586494] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:46,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:46,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 6 [2022-01-18 14:46:46,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542484593] [2022-01-18 14:46:46,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:46,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:46:46,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:46,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:46:46,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:46:46,927 INFO L87 Difference]: Start difference. First operand 18554 states and 81571 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:47,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:47,234 INFO L93 Difference]: Finished difference Result 20100 states and 87095 transitions. [2022-01-18 14:46:47,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:46:47,234 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 14:46:47,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:47,292 INFO L225 Difference]: With dead ends: 20100 [2022-01-18 14:46:47,292 INFO L226 Difference]: Without dead ends: 20049 [2022-01-18 14:46:47,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 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 14:46:47,293 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 63 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:47,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 94 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:46:47,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20049 states. [2022-01-18 14:46:47,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20049 to 19378. [2022-01-18 14:46:47,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19378 states, 19377 states have (on average 4.372555091087372) internal successors, (84727), 19377 states have internal predecessors, (84727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:47,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19378 states to 19378 states and 84727 transitions. [2022-01-18 14:46:47,721 INFO L78 Accepts]: Start accepts. Automaton has 19378 states and 84727 transitions. Word has length 27 [2022-01-18 14:46:47,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:47,721 INFO L470 AbstractCegarLoop]: Abstraction has 19378 states and 84727 transitions. [2022-01-18 14:46:47,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:47,721 INFO L276 IsEmpty]: Start isEmpty. Operand 19378 states and 84727 transitions. [2022-01-18 14:46:47,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:46:47,763 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:47,763 INFO L514 BasicCegarLoop]: trace histogram [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 14:46:47,779 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 14:46:47,978 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 14:46:47,978 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 14:46:47,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:47,979 INFO L85 PathProgramCache]: Analyzing trace with hash 932751691, now seen corresponding path program 14 times [2022-01-18 14:46:47,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:47,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104261992] [2022-01-18 14:46:47,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:47,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:48,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:46:48,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:48,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104261992] [2022-01-18 14:46:48,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104261992] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:48,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853094804] [2022-01-18 14:46:48,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:46:48,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:48,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:48,024 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 14:46:48,025 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 14:46:48,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:46:48,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:46:48,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:46:48,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:48,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:48,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:48,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:46:48,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853094804] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:48,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:48,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 7 [2022-01-18 14:46:48,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267848592] [2022-01-18 14:46:48,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:48,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 14:46:48,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:48,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 14:46:48,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-18 14:46:48,411 INFO L87 Difference]: Start difference. First operand 19378 states and 84727 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 14:46:48,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:48,732 INFO L93 Difference]: Finished difference Result 20827 states and 89877 transitions. [2022-01-18 14:46:48,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 14:46:48,732 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 27 [2022-01-18 14:46:48,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:48,797 INFO L225 Difference]: With dead ends: 20827 [2022-01-18 14:46:48,797 INFO L226 Difference]: Without dead ends: 20725 [2022-01-18 14:46:48,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 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 14:46:48,798 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 80 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:48,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 100 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:46:48,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20725 states. [2022-01-18 14:46:49,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20725 to 19777. [2022-01-18 14:46:49,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19777 states, 19776 states have (on average 4.364229368932039) internal successors, (86307), 19776 states have internal predecessors, (86307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:49,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19777 states to 19777 states and 86307 transitions. [2022-01-18 14:46:49,283 INFO L78 Accepts]: Start accepts. Automaton has 19777 states and 86307 transitions. Word has length 27 [2022-01-18 14:46:49,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:49,283 INFO L470 AbstractCegarLoop]: Abstraction has 19777 states and 86307 transitions. [2022-01-18 14:46:49,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 14:46:49,283 INFO L276 IsEmpty]: Start isEmpty. Operand 19777 states and 86307 transitions. [2022-01-18 14:46:49,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 14:46:49,322 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:49,322 INFO L514 BasicCegarLoop]: trace histogram [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 14:46:49,338 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 14:46:49,522 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 14:46:49,523 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 14:46:49,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:49,523 INFO L85 PathProgramCache]: Analyzing trace with hash -534835761, now seen corresponding path program 15 times [2022-01-18 14:46:49,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:49,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023208442] [2022-01-18 14:46:49,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:49,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:49,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:46:49,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:49,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023208442] [2022-01-18 14:46:49,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023208442] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:49,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028911568] [2022-01-18 14:46:49,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:46:49,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:49,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:49,561 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 14:46:49,562 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 14:46:49,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:46:49,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:46:49,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 14:46:49,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:49,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:49,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:49,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:46:49,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028911568] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:49,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:49,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 6 [2022-01-18 14:46:49,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347412594] [2022-01-18 14:46:49,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:49,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 14:46:49,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:49,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 14:46:49,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:46:49,894 INFO L87 Difference]: Start difference. First operand 19777 states and 86307 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 14:46:50,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:50,154 INFO L93 Difference]: Finished difference Result 21148 states and 91258 transitions. [2022-01-18 14:46:50,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 14:46:50,154 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 27 [2022-01-18 14:46:50,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:50,219 INFO L225 Difference]: With dead ends: 21148 [2022-01-18 14:46:50,219 INFO L226 Difference]: Without dead ends: 21097 [2022-01-18 14:46:50,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 14:46:50,220 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 63 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:50,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 94 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 14:46:50,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21097 states. [2022-01-18 14:46:50,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21097 to 20386. [2022-01-18 14:46:50,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20386 states, 20385 states have (on average 4.351925435369144) internal successors, (88714), 20385 states have internal predecessors, (88714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:50,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20386 states to 20386 states and 88714 transitions. [2022-01-18 14:46:50,653 INFO L78 Accepts]: Start accepts. Automaton has 20386 states and 88714 transitions. Word has length 27 [2022-01-18 14:46:50,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:50,654 INFO L470 AbstractCegarLoop]: Abstraction has 20386 states and 88714 transitions. [2022-01-18 14:46:50,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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 14:46:50,654 INFO L276 IsEmpty]: Start isEmpty. Operand 20386 states and 88714 transitions. [2022-01-18 14:46:50,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:46:50,697 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:50,697 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:46:50,712 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 14:46:50,897 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 14:46:50,897 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 14:46:50,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:50,898 INFO L85 PathProgramCache]: Analyzing trace with hash 136448359, now seen corresponding path program 16 times [2022-01-18 14:46:50,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:50,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948719189] [2022-01-18 14:46:50,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:50,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:50,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:50,934 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:50,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:50,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948719189] [2022-01-18 14:46:50,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948719189] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:50,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041304502] [2022-01-18 14:46:50,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:46:50,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:50,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:50,936 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 14:46:50,936 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 14:46:50,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:46:50,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:46:50,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:46:50,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:51,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:51,101 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:51,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041304502] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:51,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:51,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 14:46:51,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888215948] [2022-01-18 14:46:51,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:51,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:46:51,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:51,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:46:51,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:46:51,102 INFO L87 Difference]: Start difference. First operand 20386 states and 88714 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 14:46:52,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:52,392 INFO L93 Difference]: Finished difference Result 53500 states and 225350 transitions. [2022-01-18 14:46:52,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 14:46:52,393 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 29 [2022-01-18 14:46:52,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:52,603 INFO L225 Difference]: With dead ends: 53500 [2022-01-18 14:46:52,604 INFO L226 Difference]: Without dead ends: 53500 [2022-01-18 14:46:52,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 14:46:52,604 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 291 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:52,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 685 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1485 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:46:52,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53500 states. [2022-01-18 14:46:53,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53500 to 19796. [2022-01-18 14:46:53,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19796 states, 19795 states have (on average 4.3231624147512) internal successors, (85577), 19795 states have internal predecessors, (85577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:53,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19796 states to 19796 states and 85577 transitions. [2022-01-18 14:46:53,397 INFO L78 Accepts]: Start accepts. Automaton has 19796 states and 85577 transitions. Word has length 29 [2022-01-18 14:46:53,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:53,397 INFO L470 AbstractCegarLoop]: Abstraction has 19796 states and 85577 transitions. [2022-01-18 14:46:53,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 14:46:53,397 INFO L276 IsEmpty]: Start isEmpty. Operand 19796 states and 85577 transitions. [2022-01-18 14:46:53,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:46:53,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:53,439 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:46:53,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-18 14:46:53,639 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 14:46:53,639 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 14:46:53,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:53,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1636435097, now seen corresponding path program 17 times [2022-01-18 14:46:53,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:53,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634733017] [2022-01-18 14:46:53,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:53,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:53,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:53,669 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:53,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:53,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634733017] [2022-01-18 14:46:53,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634733017] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:53,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234858661] [2022-01-18 14:46:53,669 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:46:53,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:53,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:53,670 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 14:46:53,671 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 14:46:53,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:46:53,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:46:53,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:46:53,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:53,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:53,818 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:53,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234858661] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:53,819 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:53,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 14:46:53,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236304908] [2022-01-18 14:46:53,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:53,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:46:53,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:53,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:46:53,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:46:53,820 INFO L87 Difference]: Start difference. First operand 19796 states and 85577 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 14:46:54,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:54,538 INFO L93 Difference]: Finished difference Result 43808 states and 178847 transitions. [2022-01-18 14:46:54,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 14:46:54,538 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 29 [2022-01-18 14:46:54,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:54,695 INFO L225 Difference]: With dead ends: 43808 [2022-01-18 14:46:54,696 INFO L226 Difference]: Without dead ends: 43528 [2022-01-18 14:46:54,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 14:46:54,696 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 569 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:54,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [569 Valid, 282 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:46:54,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43528 states. [2022-01-18 14:46:55,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43528 to 24598. [2022-01-18 14:46:55,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24598 states, 24597 states have (on average 4.382323047526121) internal successors, (107792), 24597 states have internal predecessors, (107792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:55,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24598 states to 24598 states and 107792 transitions. [2022-01-18 14:46:55,416 INFO L78 Accepts]: Start accepts. Automaton has 24598 states and 107792 transitions. Word has length 29 [2022-01-18 14:46:55,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:55,416 INFO L470 AbstractCegarLoop]: Abstraction has 24598 states and 107792 transitions. [2022-01-18 14:46:55,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 14:46:55,416 INFO L276 IsEmpty]: Start isEmpty. Operand 24598 states and 107792 transitions. [2022-01-18 14:46:55,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:46:55,470 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:55,470 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:46:55,485 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 14:46:55,670 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 14:46:55,671 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 14:46:55,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:55,671 INFO L85 PathProgramCache]: Analyzing trace with hash -115245213, now seen corresponding path program 18 times [2022-01-18 14:46:55,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:55,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998779683] [2022-01-18 14:46:55,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:55,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:55,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:55,697 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:55,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:55,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998779683] [2022-01-18 14:46:55,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998779683] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:55,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511880674] [2022-01-18 14:46:55,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:46:55,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:55,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:55,698 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 14:46:55,700 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 14:46:55,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 14:46:55,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:46:55,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:46:55,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:55,797 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:55,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:55,845 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:55,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511880674] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:55,846 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:55,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9 [2022-01-18 14:46:55,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776008778] [2022-01-18 14:46:55,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:55,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:46:55,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:55,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:46:55,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:46:55,847 INFO L87 Difference]: Start difference. First operand 24598 states and 107792 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 14:46:56,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:56,529 INFO L93 Difference]: Finished difference Result 44391 states and 182619 transitions. [2022-01-18 14:46:56,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 14:46:56,530 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 29 [2022-01-18 14:46:56,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:56,684 INFO L225 Difference]: With dead ends: 44391 [2022-01-18 14:46:56,684 INFO L226 Difference]: Without dead ends: 44391 [2022-01-18 14:46:56,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:46:56,685 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 424 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:56,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 295 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:46:56,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44391 states. [2022-01-18 14:46:57,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44391 to 24443. [2022-01-18 14:46:57,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24443 states, 24442 states have (on average 4.371900826446281) internal successors, (106858), 24442 states have internal predecessors, (106858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:57,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24443 states to 24443 states and 106858 transitions. [2022-01-18 14:46:57,529 INFO L78 Accepts]: Start accepts. Automaton has 24443 states and 106858 transitions. Word has length 29 [2022-01-18 14:46:57,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:57,529 INFO L470 AbstractCegarLoop]: Abstraction has 24443 states and 106858 transitions. [2022-01-18 14:46:57,529 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 14:46:57,529 INFO L276 IsEmpty]: Start isEmpty. Operand 24443 states and 106858 transitions. [2022-01-18 14:46:57,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:46:57,582 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:57,582 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:46:57,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-01-18 14:46:57,784 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 14:46:57,784 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 14:46:57,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:57,784 INFO L85 PathProgramCache]: Analyzing trace with hash 331365663, now seen corresponding path program 19 times [2022-01-18 14:46:57,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:57,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102512607] [2022-01-18 14:46:57,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:57,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:57,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:57,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102512607] [2022-01-18 14:46:57,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102512607] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:57,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903956314] [2022-01-18 14:46:57,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:46:57,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:57,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:57,818 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 14:46:57,820 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 14:46:57,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:57,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:46:57,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:57,913 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:57,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:57,960 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:57,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903956314] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:57,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:57,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9 [2022-01-18 14:46:57,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413279624] [2022-01-18 14:46:57,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:57,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:46:57,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:57,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:46:57,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:46:57,961 INFO L87 Difference]: Start difference. First operand 24443 states and 106858 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 14:46:58,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:46:58,510 INFO L93 Difference]: Finished difference Result 32700 states and 137404 transitions. [2022-01-18 14:46:58,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 14:46:58,510 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 29 [2022-01-18 14:46:58,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:46:58,621 INFO L225 Difference]: With dead ends: 32700 [2022-01-18 14:46:58,622 INFO L226 Difference]: Without dead ends: 32680 [2022-01-18 14:46:58,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:46:58,622 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 221 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:46:58,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 441 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:46:58,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32680 states. [2022-01-18 14:46:59,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32680 to 24521. [2022-01-18 14:46:59,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24521 states, 24520 states have (on average 4.369453507340946) internal successors, (107139), 24520 states have internal predecessors, (107139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:46:59,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24521 states to 24521 states and 107139 transitions. [2022-01-18 14:46:59,313 INFO L78 Accepts]: Start accepts. Automaton has 24521 states and 107139 transitions. Word has length 29 [2022-01-18 14:46:59,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:46:59,314 INFO L470 AbstractCegarLoop]: Abstraction has 24521 states and 107139 transitions. [2022-01-18 14:46:59,314 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 14:46:59,314 INFO L276 IsEmpty]: Start isEmpty. Operand 24521 states and 107139 transitions. [2022-01-18 14:46:59,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:46:59,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:46:59,366 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:46:59,381 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 14:46:59,566 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 14:46:59,566 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 14:46:59,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:46:59,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1556022237, now seen corresponding path program 20 times [2022-01-18 14:46:59,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:46:59,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057191788] [2022-01-18 14:46:59,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:46:59,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:46:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:46:59,602 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:59,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:46:59,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057191788] [2022-01-18 14:46:59,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057191788] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:46:59,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392815305] [2022-01-18 14:46:59,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:46:59,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:46:59,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:46:59,604 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 14:46:59,605 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 14:46:59,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:46:59,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:46:59,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:46:59,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:46:59,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:46:59,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:46:59,767 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:46:59,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392815305] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:46:59,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:46:59,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 10 [2022-01-18 14:46:59,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192196832] [2022-01-18 14:46:59,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:46:59,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:46:59,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:46:59,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:46:59,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:46:59,768 INFO L87 Difference]: Start difference. First operand 24521 states and 107139 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 14:47:00,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:47:00,760 INFO L93 Difference]: Finished difference Result 84322 states and 354953 transitions. [2022-01-18 14:47:00,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 14:47:00,761 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 29 [2022-01-18 14:47:00,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:47:01,092 INFO L225 Difference]: With dead ends: 84322 [2022-01-18 14:47:01,093 INFO L226 Difference]: Without dead ends: 84322 [2022-01-18 14:47:01,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:47:01,093 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 481 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:47:01,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 293 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:47:01,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84322 states. [2022-01-18 14:47:02,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84322 to 31834. [2022-01-18 14:47:02,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31834 states, 31833 states have (on average 4.49231929130148) internal successors, (143004), 31833 states have internal predecessors, (143004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:47:02,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31834 states to 31834 states and 143004 transitions. [2022-01-18 14:47:02,322 INFO L78 Accepts]: Start accepts. Automaton has 31834 states and 143004 transitions. Word has length 29 [2022-01-18 14:47:02,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:47:02,322 INFO L470 AbstractCegarLoop]: Abstraction has 31834 states and 143004 transitions. [2022-01-18 14:47:02,323 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 14:47:02,323 INFO L276 IsEmpty]: Start isEmpty. Operand 31834 states and 143004 transitions. [2022-01-18 14:47:02,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:47:02,394 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:47:02,394 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:47:02,409 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 14:47:02,594 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 14:47:02,594 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 14:47:02,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:47:02,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1231344803, now seen corresponding path program 21 times [2022-01-18 14:47:02,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:47:02,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358724979] [2022-01-18 14:47:02,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:47:02,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:47:02,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:47:02,615 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:02,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:47:02,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358724979] [2022-01-18 14:47:02,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358724979] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:47:02,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771105004] [2022-01-18 14:47:02,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:47:02,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:47:02,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:47:02,616 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 14:47:02,617 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 14:47:02,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 14:47:02,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:47:02,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:47:02,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:47:02,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:02,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:47:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:47:02,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771105004] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:47:02,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:47:02,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 10 [2022-01-18 14:47:02,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288521697] [2022-01-18 14:47:02,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:47:02,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:47:02,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:47:02,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:47:02,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:47:02,784 INFO L87 Difference]: Start difference. First operand 31834 states and 143004 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 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 14:47:03,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:47:03,572 INFO L93 Difference]: Finished difference Result 53630 states and 225777 transitions. [2022-01-18 14:47:03,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 14:47:03,572 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 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 29 [2022-01-18 14:47:03,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:47:03,760 INFO L225 Difference]: With dead ends: 53630 [2022-01-18 14:47:03,760 INFO L226 Difference]: Without dead ends: 53574 [2022-01-18 14:47:03,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:47:03,761 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 321 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:47:03,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 492 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:47:03,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53574 states. [2022-01-18 14:47:04,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53574 to 31834. [2022-01-18 14:47:04,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31834 states, 31833 states have (on average 4.492005151886407) internal successors, (142994), 31833 states have internal predecessors, (142994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:47:04,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31834 states to 31834 states and 142994 transitions. [2022-01-18 14:47:04,675 INFO L78 Accepts]: Start accepts. Automaton has 31834 states and 142994 transitions. Word has length 29 [2022-01-18 14:47:04,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:47:04,675 INFO L470 AbstractCegarLoop]: Abstraction has 31834 states and 142994 transitions. [2022-01-18 14:47:04,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 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 14:47:04,675 INFO L276 IsEmpty]: Start isEmpty. Operand 31834 states and 142994 transitions. [2022-01-18 14:47:04,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:47:04,744 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:47:04,744 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:47:04,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-01-18 14:47:04,946 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 14:47:04,946 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 14:47:04,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:47:04,946 INFO L85 PathProgramCache]: Analyzing trace with hash 172392223, now seen corresponding path program 22 times [2022-01-18 14:47:04,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:47:04,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149588822] [2022-01-18 14:47:04,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:47:04,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:47:04,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:47:04,975 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:47:04,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:47:04,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149588822] [2022-01-18 14:47:04,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149588822] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:47:04,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76255693] [2022-01-18 14:47:04,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:47:04,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:47:04,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:47:04,976 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 14:47:04,979 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 14:47:04,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:47:04,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:47:04,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:47:04,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:47:05,076 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:05,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:47:05,118 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:47:05,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76255693] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:47:05,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:47:05,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 10 [2022-01-18 14:47:05,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515242646] [2022-01-18 14:47:05,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:47:05,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:47:05,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:47:05,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:47:05,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:47:05,119 INFO L87 Difference]: Start difference. First operand 31834 states and 142994 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 14:47:06,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:47:06,027 INFO L93 Difference]: Finished difference Result 63201 states and 266555 transitions. [2022-01-18 14:47:06,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 14:47:06,028 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 29 [2022-01-18 14:47:06,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:47:06,257 INFO L225 Difference]: With dead ends: 63201 [2022-01-18 14:47:06,258 INFO L226 Difference]: Without dead ends: 63201 [2022-01-18 14:47:06,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2022-01-18 14:47:06,258 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 352 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:47:06,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 476 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:47:06,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63201 states. [2022-01-18 14:47:07,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63201 to 31971. [2022-01-18 14:47:07,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31971 states, 31970 states have (on average 4.490710040663122) internal successors, (143568), 31970 states have internal predecessors, (143568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:47:07,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31971 states to 31971 states and 143568 transitions. [2022-01-18 14:47:07,278 INFO L78 Accepts]: Start accepts. Automaton has 31971 states and 143568 transitions. Word has length 29 [2022-01-18 14:47:07,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:47:07,278 INFO L470 AbstractCegarLoop]: Abstraction has 31971 states and 143568 transitions. [2022-01-18 14:47:07,278 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 14:47:07,278 INFO L276 IsEmpty]: Start isEmpty. Operand 31971 states and 143568 transitions. [2022-01-18 14:47:07,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:47:07,350 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:47:07,350 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:47:07,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-18 14:47:07,551 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 14:47:07,551 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 14:47:07,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:47:07,551 INFO L85 PathProgramCache]: Analyzing trace with hash 619003099, now seen corresponding path program 23 times [2022-01-18 14:47:07,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:47:07,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353486092] [2022-01-18 14:47:07,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:47:07,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:47:07,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:47:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:47:07,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:47:07,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353486092] [2022-01-18 14:47:07,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353486092] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:47:07,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140660524] [2022-01-18 14:47:07,588 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:47:07,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:47:07,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:47:07,589 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 14:47:07,589 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 14:47:07,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 14:47:07,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:47:07,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:47:07,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:47:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:07,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:47:07,723 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:47:07,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140660524] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:47:07,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:47:07,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 10 [2022-01-18 14:47:07,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262619834] [2022-01-18 14:47:07,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:47:07,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:47:07,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:47:07,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:47:07,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:47:07,724 INFO L87 Difference]: Start difference. First operand 31971 states and 143568 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 14:47:08,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:47:08,443 INFO L93 Difference]: Finished difference Result 64043 states and 270031 transitions. [2022-01-18 14:47:08,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 14:47:08,444 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 29 [2022-01-18 14:47:08,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:47:08,676 INFO L225 Difference]: With dead ends: 64043 [2022-01-18 14:47:08,676 INFO L226 Difference]: Without dead ends: 64003 [2022-01-18 14:47:08,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:47:08,677 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 469 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:47:08,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 339 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:47:08,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64003 states. [2022-01-18 14:47:09,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64003 to 31981. [2022-01-18 14:47:09,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31981 states, 31980 states have (on average 4.49015009380863) internal successors, (143595), 31980 states have internal predecessors, (143595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:47:09,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31981 states to 31981 states and 143595 transitions. [2022-01-18 14:47:09,664 INFO L78 Accepts]: Start accepts. Automaton has 31981 states and 143595 transitions. Word has length 29 [2022-01-18 14:47:09,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:47:09,664 INFO L470 AbstractCegarLoop]: Abstraction has 31981 states and 143595 transitions. [2022-01-18 14:47:09,664 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 14:47:09,664 INFO L276 IsEmpty]: Start isEmpty. Operand 31981 states and 143595 transitions. [2022-01-18 14:47:09,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:47:09,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:47:09,733 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:47:09,748 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 14:47:09,934 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 14:47:09,934 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 14:47:09,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:47:09,934 INFO L85 PathProgramCache]: Analyzing trace with hash -96354205, now seen corresponding path program 24 times [2022-01-18 14:47:09,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:47:09,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080634241] [2022-01-18 14:47:09,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:47:09,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:47:09,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:47:09,966 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:09,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:47:09,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080634241] [2022-01-18 14:47:09,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080634241] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:47:09,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500716930] [2022-01-18 14:47:09,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:47:09,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:47:09,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:47:09,967 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 14:47:09,969 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 14:47:09,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 14:47:09,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:47:09,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:47:09,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:47:10,078 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:10,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:47:10,134 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:10,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500716930] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:47:10,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:47:10,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11 [2022-01-18 14:47:10,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758391405] [2022-01-18 14:47:10,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:47:10,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:47:10,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:47:10,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:47:10,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:47:10,136 INFO L87 Difference]: Start difference. First operand 31981 states and 143595 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 14:47:10,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:47:10,983 INFO L93 Difference]: Finished difference Result 53971 states and 230205 transitions. [2022-01-18 14:47:10,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 14:47:10,983 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 29 [2022-01-18 14:47:10,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:47:11,191 INFO L225 Difference]: With dead ends: 53971 [2022-01-18 14:47:11,191 INFO L226 Difference]: Without dead ends: 53971 [2022-01-18 14:47:11,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 14:47:11,192 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 415 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:47:11,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 404 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:47:11,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53971 states. [2022-01-18 14:47:11,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53971 to 30565. [2022-01-18 14:47:11,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30565 states, 30564 states have (on average 4.463290145268944) internal successors, (136416), 30564 states have internal predecessors, (136416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:47:12,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30565 states to 30565 states and 136416 transitions. [2022-01-18 14:47:12,060 INFO L78 Accepts]: Start accepts. Automaton has 30565 states and 136416 transitions. Word has length 29 [2022-01-18 14:47:12,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:47:12,060 INFO L470 AbstractCegarLoop]: Abstraction has 30565 states and 136416 transitions. [2022-01-18 14:47:12,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 14:47:12,060 INFO L276 IsEmpty]: Start isEmpty. Operand 30565 states and 136416 transitions. [2022-01-18 14:47:12,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:47:12,129 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:47:12,129 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:47:12,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-01-18 14:47:12,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:47:12,330 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:47:12,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:47:12,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1931600191, now seen corresponding path program 25 times [2022-01-18 14:47:12,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:47:12,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007041945] [2022-01-18 14:47:12,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:47:12,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:47:12,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:47:12,362 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:12,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:47:12,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007041945] [2022-01-18 14:47:12,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007041945] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:47:12,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703588226] [2022-01-18 14:47:12,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:47:12,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:47:12,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:47:12,363 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:47:12,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 14:47:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:47:12,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:47:12,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:47:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:12,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:47:12,507 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:12,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703588226] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:47:12,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:47:12,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11 [2022-01-18 14:47:12,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800769788] [2022-01-18 14:47:12,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:47:12,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:47:12,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:47:12,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:47:12,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:47:12,508 INFO L87 Difference]: Start difference. First operand 30565 states and 136416 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 14:47:13,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:47:13,440 INFO L93 Difference]: Finished difference Result 54874 states and 230950 transitions. [2022-01-18 14:47:13,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 14:47:13,440 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 29 [2022-01-18 14:47:13,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:47:13,645 INFO L225 Difference]: With dead ends: 54874 [2022-01-18 14:47:13,646 INFO L226 Difference]: Without dead ends: 54814 [2022-01-18 14:47:13,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:47:13,646 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 443 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:47:13,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 390 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:47:13,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54814 states. [2022-01-18 14:47:14,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54814 to 30989. [2022-01-18 14:47:14,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30989 states, 30988 states have (on average 4.461081709048664) internal successors, (138240), 30988 states have internal predecessors, (138240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:47:14,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30989 states to 30989 states and 138240 transitions. [2022-01-18 14:47:14,665 INFO L78 Accepts]: Start accepts. Automaton has 30989 states and 138240 transitions. Word has length 29 [2022-01-18 14:47:14,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:47:14,665 INFO L470 AbstractCegarLoop]: Abstraction has 30989 states and 138240 transitions. [2022-01-18 14:47:14,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 14:47:14,666 INFO L276 IsEmpty]: Start isEmpty. Operand 30989 states and 138240 transitions. [2022-01-18 14:47:14,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:47:14,732 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:47:14,732 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:47:14,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-18 14:47:14,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-01-18 14:47:14,933 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:47:14,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:47:14,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1226629401, now seen corresponding path program 26 times [2022-01-18 14:47:14,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:47:14,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720830980] [2022-01-18 14:47:14,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:47:14,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:47:15,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:47:15,146 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:15,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:47:15,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720830980] [2022-01-18 14:47:15,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720830980] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:47:15,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944057929] [2022-01-18 14:47:15,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:47:15,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:47:15,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:47:15,148 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:47:15,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 14:47:15,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:47:15,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:47:15,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:47:15,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:47:15,274 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:15,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:47:15,321 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:47:15,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944057929] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:47:15,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:47:15,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11 [2022-01-18 14:47:15,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115293477] [2022-01-18 14:47:15,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:47:15,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:47:15,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:47:15,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:47:15,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:47:15,322 INFO L87 Difference]: Start difference. First operand 30989 states and 138240 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 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 14:47:16,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:47:16,288 INFO L93 Difference]: Finished difference Result 67378 states and 285832 transitions. [2022-01-18 14:47:16,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 14:47:16,289 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 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 29 [2022-01-18 14:47:16,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:47:16,855 INFO L225 Difference]: With dead ends: 67378 [2022-01-18 14:47:16,855 INFO L226 Difference]: Without dead ends: 67378 [2022-01-18 14:47:16,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 14:47:16,855 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 535 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:47:16,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [535 Valid, 346 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:47:16,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67378 states. [2022-01-18 14:47:17,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67378 to 29898. [2022-01-18 14:47:17,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29898 states, 29897 states have (on average 4.434090376960899) internal successors, (132566), 29897 states have internal predecessors, (132566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:47:17,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29898 states to 29898 states and 132566 transitions. [2022-01-18 14:47:17,952 INFO L78 Accepts]: Start accepts. Automaton has 29898 states and 132566 transitions. Word has length 29 [2022-01-18 14:47:17,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:47:17,952 INFO L470 AbstractCegarLoop]: Abstraction has 29898 states and 132566 transitions. [2022-01-18 14:47:17,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 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 14:47:17,952 INFO L276 IsEmpty]: Start isEmpty. Operand 29898 states and 132566 transitions. [2022-01-18 14:47:18,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:47:18,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:47:18,016 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:47:18,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 14:47:18,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-01-18 14:47:18,218 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:47:18,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:47:18,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1668470631, now seen corresponding path program 27 times [2022-01-18 14:47:18,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:47:18,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842311194] [2022-01-18 14:47:18,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:47:18,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:47:18,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:47:18,252 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:18,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:47:18,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842311194] [2022-01-18 14:47:18,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842311194] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:47:18,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204314191] [2022-01-18 14:47:18,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:47:18,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:47:18,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:47:18,253 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:47:18,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 14:47:18,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:47:18,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:47:18,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:47:18,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:47:18,348 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:18,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:47:18,389 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:47:18,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204314191] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:47:18,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:47:18,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11 [2022-01-18 14:47:18,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111770066] [2022-01-18 14:47:18,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:47:18,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:47:18,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:47:18,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:47:18,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:47:18,390 INFO L87 Difference]: Start difference. First operand 29898 states and 132566 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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 14:47:19,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:47:19,346 INFO L93 Difference]: Finished difference Result 44092 states and 184185 transitions. [2022-01-18 14:47:19,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 14:47:19,346 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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 29 [2022-01-18 14:47:19,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:47:19,509 INFO L225 Difference]: With dead ends: 44092 [2022-01-18 14:47:19,509 INFO L226 Difference]: Without dead ends: 44008 [2022-01-18 14:47:19,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:47:19,509 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 350 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:47:19,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 469 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:47:19,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44008 states. [2022-01-18 14:47:20,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44008 to 28760. [2022-01-18 14:47:20,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28760 states, 28759 states have (on average 4.440905455683438) internal successors, (127716), 28759 states have internal predecessors, (127716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:47:20,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28760 states to 28760 states and 127716 transitions. [2022-01-18 14:47:20,407 INFO L78 Accepts]: Start accepts. Automaton has 28760 states and 127716 transitions. Word has length 29 [2022-01-18 14:47:20,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:47:20,408 INFO L470 AbstractCegarLoop]: Abstraction has 28760 states and 127716 transitions. [2022-01-18 14:47:20,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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 14:47:20,408 INFO L276 IsEmpty]: Start isEmpty. Operand 28760 states and 127716 transitions. [2022-01-18 14:47:20,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:47:20,471 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:47:20,471 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:47:20,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-18 14:47:20,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-01-18 14:47:20,672 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:47:20,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:47:20,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1199527587, now seen corresponding path program 28 times [2022-01-18 14:47:20,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:47:20,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977377092] [2022-01-18 14:47:20,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:47:20,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:47:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:47:20,696 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:20,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:47:20,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977377092] [2022-01-18 14:47:20,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977377092] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:47:20,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371497334] [2022-01-18 14:47:20,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:47:20,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:47:20,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:47:20,697 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:47:20,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 14:47:20,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:47:20,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:47:20,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:47:20,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:47:20,795 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:20,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:47:20,850 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:47:20,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371497334] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:47:20,850 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:47:20,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9 [2022-01-18 14:47:20,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137212524] [2022-01-18 14:47:20,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:47:20,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:47:20,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:47:20,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:47:20,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:47:20,851 INFO L87 Difference]: Start difference. First operand 28760 states and 127716 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 14:47:21,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:47:21,774 INFO L93 Difference]: Finished difference Result 60388 states and 252684 transitions. [2022-01-18 14:47:21,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 14:47:21,774 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 29 [2022-01-18 14:47:21,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:47:22,015 INFO L225 Difference]: With dead ends: 60388 [2022-01-18 14:47:22,015 INFO L226 Difference]: Without dead ends: 60388 [2022-01-18 14:47:22,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:47:22,016 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 535 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:47:22,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [535 Valid, 232 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:47:22,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60388 states. [2022-01-18 14:47:22,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60388 to 30620. [2022-01-18 14:47:22,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30620 states, 30619 states have (on average 4.473431529442503) internal successors, (136972), 30619 states have internal predecessors, (136972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:47:23,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30620 states to 30620 states and 136972 transitions. [2022-01-18 14:47:23,030 INFO L78 Accepts]: Start accepts. Automaton has 30620 states and 136972 transitions. Word has length 29 [2022-01-18 14:47:23,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:47:23,030 INFO L470 AbstractCegarLoop]: Abstraction has 30620 states and 136972 transitions. [2022-01-18 14:47:23,030 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 14:47:23,030 INFO L276 IsEmpty]: Start isEmpty. Operand 30620 states and 136972 transitions. [2022-01-18 14:47:23,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:47:23,099 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:47:23,099 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:47:23,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-01-18 14:47:23,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-01-18 14:47:23,303 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:47:23,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:47:23,303 INFO L85 PathProgramCache]: Analyzing trace with hash -308072669, now seen corresponding path program 29 times [2022-01-18 14:47:23,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:47:23,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787783269] [2022-01-18 14:47:23,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:47:23,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:47:23,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:47:23,337 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:23,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:47:23,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787783269] [2022-01-18 14:47:23,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787783269] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:47:23,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281898105] [2022-01-18 14:47:23,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:47:23,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:47:23,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:47:23,338 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:47:23,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 14:47:23,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:47:23,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:47:23,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:47:23,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:47:23,430 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:23,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:47:23,483 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:47:23,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281898105] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:47:23,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:47:23,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9 [2022-01-18 14:47:23,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983259927] [2022-01-18 14:47:23,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:47:23,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:47:23,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:47:23,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:47:23,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:47:23,484 INFO L87 Difference]: Start difference. First operand 30620 states and 136972 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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 14:47:24,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:47:24,291 INFO L93 Difference]: Finished difference Result 41767 states and 177773 transitions. [2022-01-18 14:47:24,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 14:47:24,291 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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 29 [2022-01-18 14:47:24,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:47:24,438 INFO L225 Difference]: With dead ends: 41767 [2022-01-18 14:47:24,438 INFO L226 Difference]: Without dead ends: 41739 [2022-01-18 14:47:24,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:47:24,439 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 224 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:47:24,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 380 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:47:24,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41739 states. [2022-01-18 14:47:25,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41739 to 30609. [2022-01-18 14:47:25,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30609 states, 30608 states have (on average 4.473078933612127) internal successors, (136912), 30608 states have internal predecessors, (136912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:47:25,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30609 states to 30609 states and 136912 transitions. [2022-01-18 14:47:25,380 INFO L78 Accepts]: Start accepts. Automaton has 30609 states and 136912 transitions. Word has length 29 [2022-01-18 14:47:25,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:47:25,380 INFO L470 AbstractCegarLoop]: Abstraction has 30609 states and 136912 transitions. [2022-01-18 14:47:25,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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 14:47:25,380 INFO L276 IsEmpty]: Start isEmpty. Operand 30609 states and 136912 transitions. [2022-01-18 14:47:25,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:47:25,447 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:47:25,447 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:47:25,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-01-18 14:47:25,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-01-18 14:47:25,647 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:47:25,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:47:25,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1367025249, now seen corresponding path program 30 times [2022-01-18 14:47:25,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:47:25,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169180873] [2022-01-18 14:47:25,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:47:25,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:47:25,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:47:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:25,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:47:25,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169180873] [2022-01-18 14:47:25,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169180873] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:47:25,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931100093] [2022-01-18 14:47:25,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:47:25,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:47:25,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:47:25,675 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:47:25,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 14:47:25,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 14:47:25,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:47:25,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:47:25,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:47:25,768 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:25,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:47:25,811 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:47:25,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931100093] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:47:25,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:47:25,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9 [2022-01-18 14:47:25,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288891194] [2022-01-18 14:47:25,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:47:25,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:47:25,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:47:25,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:47:25,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:47:25,812 INFO L87 Difference]: Start difference. First operand 30609 states and 136912 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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 14:47:26,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:47:26,685 INFO L93 Difference]: Finished difference Result 47385 states and 201554 transitions. [2022-01-18 14:47:26,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 14:47:26,686 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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 29 [2022-01-18 14:47:26,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:47:26,846 INFO L225 Difference]: With dead ends: 47385 [2022-01-18 14:47:26,846 INFO L226 Difference]: Without dead ends: 47385 [2022-01-18 14:47:26,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2022-01-18 14:47:26,847 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 279 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:47:26,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 383 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:47:26,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47385 states. [2022-01-18 14:47:27,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47385 to 30746. [2022-01-18 14:47:27,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30746 states, 30745 states have (on average 4.471816555537486) internal successors, (137486), 30745 states have internal predecessors, (137486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:47:27,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30746 states to 30746 states and 137486 transitions. [2022-01-18 14:47:27,835 INFO L78 Accepts]: Start accepts. Automaton has 30746 states and 137486 transitions. Word has length 29 [2022-01-18 14:47:27,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:47:27,835 INFO L470 AbstractCegarLoop]: Abstraction has 30746 states and 137486 transitions. [2022-01-18 14:47:27,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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 14:47:27,836 INFO L276 IsEmpty]: Start isEmpty. Operand 30746 states and 137486 transitions. [2022-01-18 14:47:28,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:47:28,131 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:47:28,131 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:47:28,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-01-18 14:47:28,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:47:28,339 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:47:28,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:47:28,340 INFO L85 PathProgramCache]: Analyzing trace with hash -920414373, now seen corresponding path program 31 times [2022-01-18 14:47:28,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:47:28,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422418824] [2022-01-18 14:47:28,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:47:28,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:47:28,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:47:28,363 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:28,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:47:28,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422418824] [2022-01-18 14:47:28,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422418824] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:47:28,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101456927] [2022-01-18 14:47:28,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:47:28,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:47:28,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:47:28,365 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:47:28,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 14:47:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:47:28,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:47:28,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:47:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:28,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:47:28,495 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:47:28,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101456927] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:47:28,495 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:47:28,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9 [2022-01-18 14:47:28,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355831115] [2022-01-18 14:47:28,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:47:28,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:47:28,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:47:28,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:47:28,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:47:28,496 INFO L87 Difference]: Start difference. First operand 30746 states and 137486 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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 14:47:29,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:47:29,276 INFO L93 Difference]: Finished difference Result 57968 states and 241203 transitions. [2022-01-18 14:47:29,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 14:47:29,277 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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 29 [2022-01-18 14:47:29,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:47:29,502 INFO L225 Difference]: With dead ends: 57968 [2022-01-18 14:47:29,502 INFO L226 Difference]: Without dead ends: 57948 [2022-01-18 14:47:29,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2022-01-18 14:47:29,502 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 523 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:47:29,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 289 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:47:29,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57948 states. [2022-01-18 14:47:30,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57948 to 30746. [2022-01-18 14:47:30,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30746 states, 30745 states have (on average 4.471491299398276) internal successors, (137476), 30745 states have internal predecessors, (137476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:47:30,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30746 states to 30746 states and 137476 transitions. [2022-01-18 14:47:30,960 INFO L78 Accepts]: Start accepts. Automaton has 30746 states and 137476 transitions. Word has length 29 [2022-01-18 14:47:30,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:47:30,960 INFO L470 AbstractCegarLoop]: Abstraction has 30746 states and 137476 transitions. [2022-01-18 14:47:30,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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 14:47:30,960 INFO L276 IsEmpty]: Start isEmpty. Operand 30746 states and 137476 transitions. [2022-01-18 14:47:31,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:47:31,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:47:31,045 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:47:31,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-01-18 14:47:31,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:47:31,245 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:47:31,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:47:31,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1635771677, now seen corresponding path program 32 times [2022-01-18 14:47:31,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:47:31,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879795268] [2022-01-18 14:47:31,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:47:31,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:47:31,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:47:31,275 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:47:31,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:47:31,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879795268] [2022-01-18 14:47:31,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879795268] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:47:31,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468954013] [2022-01-18 14:47:31,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:47:31,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:47:31,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:47:31,276 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:47:31,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 14:47:31,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:47:31,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:47:31,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:47:31,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:47:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:31,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:47:31,444 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:47:31,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468954013] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:47:31,444 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:47:31,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-01-18 14:47:31,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180209870] [2022-01-18 14:47:31,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:47:31,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:47:31,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:47:31,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:47:31,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:47:31,445 INFO L87 Difference]: Start difference. First operand 30746 states and 137476 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 14:47:33,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:47:33,206 INFO L93 Difference]: Finished difference Result 66647 states and 285464 transitions. [2022-01-18 14:47:33,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 14:47:33,215 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 29 [2022-01-18 14:47:33,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:47:33,503 INFO L225 Difference]: With dead ends: 66647 [2022-01-18 14:47:33,503 INFO L226 Difference]: Without dead ends: 66647 [2022-01-18 14:47:33,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=565, Invalid=2191, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 14:47:33,503 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 427 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 1659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:47:33,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 758 Invalid, 1659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1625 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 14:47:33,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66647 states. [2022-01-18 14:47:34,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66647 to 31294. [2022-01-18 14:47:34,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31294 states, 31293 states have (on average 4.46655801616975) internal successors, (139772), 31293 states have internal predecessors, (139772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:47:34,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31294 states to 31294 states and 139772 transitions. [2022-01-18 14:47:34,625 INFO L78 Accepts]: Start accepts. Automaton has 31294 states and 139772 transitions. Word has length 29 [2022-01-18 14:47:34,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:47:34,625 INFO L470 AbstractCegarLoop]: Abstraction has 31294 states and 139772 transitions. [2022-01-18 14:47:34,625 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 14:47:34,625 INFO L276 IsEmpty]: Start isEmpty. Operand 31294 states and 139772 transitions. [2022-01-18 14:47:34,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:47:34,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:47:34,699 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:47:34,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-01-18 14:47:34,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:47:34,903 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:47:34,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:47:34,904 INFO L85 PathProgramCache]: Analyzing trace with hash 823949633, now seen corresponding path program 33 times [2022-01-18 14:47:34,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:47:34,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635448589] [2022-01-18 14:47:34,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:47:34,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:47:34,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:47:34,944 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:47:34,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:47:34,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635448589] [2022-01-18 14:47:34,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635448589] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:47:34,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593910872] [2022-01-18 14:47:34,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:47:34,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:47:34,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:47:34,946 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:47:34,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 14:47:34,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 14:47:34,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:47:34,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:47:34,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:47:35,042 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:35,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:47:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:47:35,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593910872] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:47:35,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:47:35,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-01-18 14:47:35,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331285902] [2022-01-18 14:47:35,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:47:35,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:47:35,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:47:35,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:47:35,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:47:35,095 INFO L87 Difference]: Start difference. First operand 31294 states and 139772 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 14:47:36,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:47:36,331 INFO L93 Difference]: Finished difference Result 67722 states and 279320 transitions. [2022-01-18 14:47:36,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 14:47:36,332 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 29 [2022-01-18 14:47:36,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:47:36,628 INFO L225 Difference]: With dead ends: 67722 [2022-01-18 14:47:36,628 INFO L226 Difference]: Without dead ends: 67522 [2022-01-18 14:47:36,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=956, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 14:47:36,628 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 584 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:47:36,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [584 Valid, 383 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:47:36,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67522 states. [2022-01-18 14:47:37,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67522 to 31300. [2022-01-18 14:47:37,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31300 states, 31299 states have (on average 4.465414230486597) internal successors, (139763), 31299 states have internal predecessors, (139763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:47:37,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31300 states to 31300 states and 139763 transitions. [2022-01-18 14:47:37,840 INFO L78 Accepts]: Start accepts. Automaton has 31300 states and 139763 transitions. Word has length 29 [2022-01-18 14:47:37,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:47:37,840 INFO L470 AbstractCegarLoop]: Abstraction has 31300 states and 139763 transitions. [2022-01-18 14:47:37,840 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 14:47:37,840 INFO L276 IsEmpty]: Start isEmpty. Operand 31300 states and 139763 transitions. [2022-01-18 14:47:37,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:47:37,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:47:37,909 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:47:37,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-18 14:47:38,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:47:38,109 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:47:38,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:47:38,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1685460577, now seen corresponding path program 34 times [2022-01-18 14:47:38,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:47:38,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697453910] [2022-01-18 14:47:38,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:47:38,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:47:38,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:47:38,145 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:38,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:47:38,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697453910] [2022-01-18 14:47:38,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697453910] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:47:38,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204273668] [2022-01-18 14:47:38,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:47:38,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:47:38,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:47:38,146 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:47:38,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 14:47:38,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:47:38,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:47:38,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:47:38,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:47:38,232 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:38,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:47:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:38,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204273668] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:47:38,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:47:38,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 14:47:38,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658082631] [2022-01-18 14:47:38,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:47:38,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:47:38,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:47:38,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:47:38,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:47:38,279 INFO L87 Difference]: Start difference. First operand 31300 states and 139763 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 14:47:39,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:47:39,701 INFO L93 Difference]: Finished difference Result 57331 states and 248639 transitions. [2022-01-18 14:47:39,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 14:47:39,701 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 29 [2022-01-18 14:47:39,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:47:39,928 INFO L225 Difference]: With dead ends: 57331 [2022-01-18 14:47:39,928 INFO L226 Difference]: Without dead ends: 57311 [2022-01-18 14:47:39,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 14:47:39,929 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 261 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 1308 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:47:39,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 611 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1308 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:47:39,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57311 states. [2022-01-18 14:47:40,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57311 to 31991. [2022-01-18 14:47:41,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31991 states, 31990 states have (on average 4.448671459831197) internal successors, (142313), 31990 states have internal predecessors, (142313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:47:41,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31991 states to 31991 states and 142313 transitions. [2022-01-18 14:47:41,147 INFO L78 Accepts]: Start accepts. Automaton has 31991 states and 142313 transitions. Word has length 29 [2022-01-18 14:47:41,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:47:41,148 INFO L470 AbstractCegarLoop]: Abstraction has 31991 states and 142313 transitions. [2022-01-18 14:47:41,148 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 14:47:41,148 INFO L276 IsEmpty]: Start isEmpty. Operand 31991 states and 142313 transitions. [2022-01-18 14:47:41,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:47:41,224 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:47:41,224 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:47:41,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-01-18 14:47:41,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-01-18 14:47:41,425 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:47:41,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:47:41,425 INFO L85 PathProgramCache]: Analyzing trace with hash 620018621, now seen corresponding path program 35 times [2022-01-18 14:47:41,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:47:41,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914147441] [2022-01-18 14:47:41,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:47:41,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:47:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:47:41,453 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:41,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:47:41,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914147441] [2022-01-18 14:47:41,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914147441] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:47:41,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713428225] [2022-01-18 14:47:41,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:47:41,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:47:41,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:47:41,455 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:47:41,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 14:47:41,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:47:41,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:47:41,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:47:41,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:47:41,541 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:41,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:47:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:41,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713428225] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:47:41,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:47:41,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 14:47:41,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677790111] [2022-01-18 14:47:41,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:47:41,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:47:41,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:47:41,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:47:41,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:47:41,598 INFO L87 Difference]: Start difference. First operand 31991 states and 142313 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 14:47:42,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:47:42,610 INFO L93 Difference]: Finished difference Result 56534 states and 233979 transitions. [2022-01-18 14:47:42,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 14:47:42,610 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 29 [2022-01-18 14:47:42,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:47:42,810 INFO L225 Difference]: With dead ends: 56534 [2022-01-18 14:47:42,810 INFO L226 Difference]: Without dead ends: 56434 [2022-01-18 14:47:42,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 14:47:42,811 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 545 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:47:42,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 338 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:47:42,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56434 states. [2022-01-18 14:47:43,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56434 to 32469. [2022-01-18 14:47:43,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32469 states, 32468 states have (on average 4.436368116299125) internal successors, (144040), 32468 states have internal predecessors, (144040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:47:43,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32469 states to 32469 states and 144040 transitions. [2022-01-18 14:47:43,856 INFO L78 Accepts]: Start accepts. Automaton has 32469 states and 144040 transitions. Word has length 29 [2022-01-18 14:47:43,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:47:43,856 INFO L470 AbstractCegarLoop]: Abstraction has 32469 states and 144040 transitions. [2022-01-18 14:47:43,856 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 14:47:43,856 INFO L276 IsEmpty]: Start isEmpty. Operand 32469 states and 144040 transitions. [2022-01-18 14:47:43,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:47:43,925 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:47:43,926 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:47:43,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-01-18 14:47:44,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-01-18 14:47:44,126 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:47:44,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:47:44,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1534820831, now seen corresponding path program 16 times [2022-01-18 14:47:44,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:47:44,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83722265] [2022-01-18 14:47:44,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:47:44,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:47:44,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:47:44,159 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:44,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:47:44,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83722265] [2022-01-18 14:47:44,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83722265] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:47:44,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061707240] [2022-01-18 14:47:44,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:47:44,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:47:44,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:47:44,160 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:47:44,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 14:47:44,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:47:44,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:47:44,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:47:44,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:47:44,251 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:44,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:47:44,300 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:44,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061707240] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:47:44,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:47:44,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 14:47:44,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607446588] [2022-01-18 14:47:44,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:47:44,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:47:44,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:47:44,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:47:44,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:47:44,301 INFO L87 Difference]: Start difference. First operand 32469 states and 144040 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 14:47:45,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:47:45,853 INFO L93 Difference]: Finished difference Result 80270 states and 344343 transitions. [2022-01-18 14:47:45,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 14:47:45,853 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 29 [2022-01-18 14:47:45,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:47:46,173 INFO L225 Difference]: With dead ends: 80270 [2022-01-18 14:47:46,174 INFO L226 Difference]: Without dead ends: 80270 [2022-01-18 14:47:46,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 14:47:46,174 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 255 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 14:47:46,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 701 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1421 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 14:47:46,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80270 states. [2022-01-18 14:47:47,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80270 to 31572. [2022-01-18 14:47:47,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31572 states, 31571 states have (on average 4.398910392448767) internal successors, (138878), 31571 states have internal predecessors, (138878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:47:47,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31572 states to 31572 states and 138878 transitions. [2022-01-18 14:47:47,647 INFO L78 Accepts]: Start accepts. Automaton has 31572 states and 138878 transitions. Word has length 29 [2022-01-18 14:47:47,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:47:47,647 INFO L470 AbstractCegarLoop]: Abstraction has 31572 states and 138878 transitions. [2022-01-18 14:47:47,647 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 14:47:47,647 INFO L276 IsEmpty]: Start isEmpty. Operand 31572 states and 138878 transitions. [2022-01-18 14:47:47,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:47:47,728 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:47:47,728 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:47:47,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-01-18 14:47:47,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-01-18 14:47:47,928 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:47:47,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:47:47,929 INFO L85 PathProgramCache]: Analyzing trace with hash 285954147, now seen corresponding path program 17 times [2022-01-18 14:47:47,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:47:47,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989885585] [2022-01-18 14:47:47,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:47:47,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:47:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:47:47,958 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:47,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:47:47,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989885585] [2022-01-18 14:47:47,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989885585] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:47:47,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430967820] [2022-01-18 14:47:47,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:47:47,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:47:47,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:47:47,959 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:47:47,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 14:47:48,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:47:48,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:47:48,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:47:48,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:47:48,270 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:48,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:47:48,317 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:48,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430967820] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:47:48,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:47:48,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 14:47:48,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790019744] [2022-01-18 14:47:48,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:47:48,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:47:48,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:47:48,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:47:48,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:47:48,318 INFO L87 Difference]: Start difference. First operand 31572 states and 138878 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 14:47:49,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:47:49,079 INFO L93 Difference]: Finished difference Result 65127 states and 271613 transitions. [2022-01-18 14:47:49,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 14:47:49,080 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 29 [2022-01-18 14:47:49,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:47:49,323 INFO L225 Difference]: With dead ends: 65127 [2022-01-18 14:47:49,323 INFO L226 Difference]: Without dead ends: 64887 [2022-01-18 14:47:49,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 14:47:49,324 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 455 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:47:49,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 316 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:47:49,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64887 states. [2022-01-18 14:47:50,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64887 to 39278. [2022-01-18 14:47:50,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39278 states, 39277 states have (on average 4.461567838684217) internal successors, (175237), 39277 states have internal predecessors, (175237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:47:50,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39278 states to 39278 states and 175237 transitions. [2022-01-18 14:47:50,569 INFO L78 Accepts]: Start accepts. Automaton has 39278 states and 175237 transitions. Word has length 29 [2022-01-18 14:47:50,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:47:50,570 INFO L470 AbstractCegarLoop]: Abstraction has 39278 states and 175237 transitions. [2022-01-18 14:47:50,570 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 14:47:50,570 INFO L276 IsEmpty]: Start isEmpty. Operand 39278 states and 175237 transitions. [2022-01-18 14:47:50,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:47:50,839 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:47:50,839 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:47:50,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-01-18 14:47:51,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:47:51,040 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:47:51,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:47:51,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1167414617, now seen corresponding path program 18 times [2022-01-18 14:47:51,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:47:51,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907648571] [2022-01-18 14:47:51,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:47:51,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:47:51,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:47:51,063 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:51,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:47:51,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907648571] [2022-01-18 14:47:51,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907648571] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:47:51,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707438843] [2022-01-18 14:47:51,063 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:47:51,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:47:51,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:47:51,064 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:47:51,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 14:47:51,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 14:47:51,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:47:51,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:47:51,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:47:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:51,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:47:51,191 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:51,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707438843] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:47:51,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:47:51,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9 [2022-01-18 14:47:51,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593007033] [2022-01-18 14:47:51,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:47:51,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:47:51,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:47:51,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:47:51,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:47:51,192 INFO L87 Difference]: Start difference. First operand 39278 states and 175237 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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 14:47:51,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:47:51,940 INFO L93 Difference]: Finished difference Result 68394 states and 287238 transitions. [2022-01-18 14:47:51,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 14:47:51,940 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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 29 [2022-01-18 14:47:51,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:47:52,191 INFO L225 Difference]: With dead ends: 68394 [2022-01-18 14:47:52,192 INFO L226 Difference]: Without dead ends: 68394 [2022-01-18 14:47:52,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:47:52,192 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 519 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:47:52,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [519 Valid, 253 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:47:52,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68394 states. [2022-01-18 14:47:53,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68394 to 39026. [2022-01-18 14:47:53,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39026 states, 39025 states have (on average 4.450608584240872) internal successors, (173685), 39025 states have internal predecessors, (173685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:47:53,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39026 states to 39026 states and 173685 transitions. [2022-01-18 14:47:53,812 INFO L78 Accepts]: Start accepts. Automaton has 39026 states and 173685 transitions. Word has length 29 [2022-01-18 14:47:53,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:47:53,812 INFO L470 AbstractCegarLoop]: Abstraction has 39026 states and 173685 transitions. [2022-01-18 14:47:53,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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 14:47:53,812 INFO L276 IsEmpty]: Start isEmpty. Operand 39026 states and 173685 transitions. [2022-01-18 14:47:53,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:47:53,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:47:53,897 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:47:53,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-01-18 14:47:54,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:47:54,097 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:47:54,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:47:54,097 INFO L85 PathProgramCache]: Analyzing trace with hash -177947937, now seen corresponding path program 19 times [2022-01-18 14:47:54,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:47:54,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759624150] [2022-01-18 14:47:54,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:47:54,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:47:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:47:54,125 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:54,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:47:54,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759624150] [2022-01-18 14:47:54,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759624150] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:47:54,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213446894] [2022-01-18 14:47:54,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:47:54,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:47:54,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:47:54,127 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:47:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:47:54,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:47:54,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:47:54,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 14:47:54,219 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:54,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:47:54,264 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:54,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213446894] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:47:54,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:47:54,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9 [2022-01-18 14:47:54,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490049480] [2022-01-18 14:47:54,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:47:54,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:47:54,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:47:54,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:47:54,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:47:54,265 INFO L87 Difference]: Start difference. First operand 39026 states and 173685 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 14:47:54,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:47:54,859 INFO L93 Difference]: Finished difference Result 49591 states and 212155 transitions. [2022-01-18 14:47:54,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 14:47:54,859 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 29 [2022-01-18 14:47:54,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:47:55,065 INFO L225 Difference]: With dead ends: 49591 [2022-01-18 14:47:55,065 INFO L226 Difference]: Without dead ends: 49566 [2022-01-18 14:47:55,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-01-18 14:47:55,065 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 173 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:47:55,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 409 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:47:55,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49566 states. [2022-01-18 14:47:56,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49566 to 39082. [2022-01-18 14:47:56,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39082 states, 39081 states have (on average 4.449553491466442) internal successors, (173893), 39081 states have internal predecessors, (173893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:47:56,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39082 states to 39082 states and 173893 transitions. [2022-01-18 14:47:56,321 INFO L78 Accepts]: Start accepts. Automaton has 39082 states and 173893 transitions. Word has length 29 [2022-01-18 14:47:56,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:47:56,322 INFO L470 AbstractCegarLoop]: Abstraction has 39082 states and 173893 transitions. [2022-01-18 14:47:56,322 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 14:47:56,322 INFO L276 IsEmpty]: Start isEmpty. Operand 39082 states and 173893 transitions. [2022-01-18 14:47:56,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:47:56,640 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:47:56,640 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:47:56,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-01-18 14:47:56,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-01-18 14:47:56,846 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:47:56,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:47:56,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1432006963, now seen corresponding path program 20 times [2022-01-18 14:47:56,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:47:56,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325940598] [2022-01-18 14:47:56,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:47:56,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:47:56,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:47:56,869 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:56,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:47:56,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325940598] [2022-01-18 14:47:56,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325940598] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:47:56,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049295483] [2022-01-18 14:47:56,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:47:56,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:47:56,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:47:56,870 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:47:56,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 14:47:56,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:47:56,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:47:56,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:47:56,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:47:56,969 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:47:56,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:47:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:47:57,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049295483] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:47:57,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:47:57,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 10 [2022-01-18 14:47:57,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110830473] [2022-01-18 14:47:57,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:47:57,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:47:57,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:47:57,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:47:57,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:47:57,013 INFO L87 Difference]: Start difference. First operand 39082 states and 173893 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:47:58,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:47:58,065 INFO L93 Difference]: Finished difference Result 122970 states and 525591 transitions. [2022-01-18 14:47:58,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 14:47:58,065 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 14:47:58,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:47:59,029 INFO L225 Difference]: With dead ends: 122970 [2022-01-18 14:47:59,030 INFO L226 Difference]: Without dead ends: 122970 [2022-01-18 14:47:59,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:47:59,030 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 495 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:47:59,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 258 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:47:59,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122970 states. [2022-01-18 14:48:00,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122970 to 51969. [2022-01-18 14:48:00,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51969 states, 51968 states have (on average 4.575142395320197) internal successors, (237761), 51968 states have internal predecessors, (237761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:48:01,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51969 states to 51969 states and 237761 transitions. [2022-01-18 14:48:01,519 INFO L78 Accepts]: Start accepts. Automaton has 51969 states and 237761 transitions. Word has length 29 [2022-01-18 14:48:01,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:48:01,519 INFO L470 AbstractCegarLoop]: Abstraction has 51969 states and 237761 transitions. [2022-01-18 14:48:01,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:48:01,519 INFO L276 IsEmpty]: Start isEmpty. Operand 51969 states and 237761 transitions. [2022-01-18 14:48:01,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:48:01,656 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:48:01,656 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:48:01,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-01-18 14:48:01,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:48:01,857 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:48:01,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:48:01,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1669970355, now seen corresponding path program 21 times [2022-01-18 14:48:01,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:48:01,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441691023] [2022-01-18 14:48:01,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:48:01,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:48:01,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:48:01,880 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:48:01,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:48:01,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441691023] [2022-01-18 14:48:01,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441691023] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:48:01,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326224729] [2022-01-18 14:48:01,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:48:01,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:48:01,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:48:01,882 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:48:01,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 14:48:01,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 14:48:01,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:48:01,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:48:01,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:48:01,999 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:48:01,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:48:02,041 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:48:02,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326224729] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:48:02,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:48:02,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 10 [2022-01-18 14:48:02,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978346227] [2022-01-18 14:48:02,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:48:02,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:48:02,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:48:02,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:48:02,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:48:02,042 INFO L87 Difference]: Start difference. First operand 51969 states and 237761 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 14:48:03,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:48:03,087 INFO L93 Difference]: Finished difference Result 83465 states and 358962 transitions. [2022-01-18 14:48:03,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 14:48:03,087 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 29 [2022-01-18 14:48:03,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:48:03,890 INFO L225 Difference]: With dead ends: 83465 [2022-01-18 14:48:03,891 INFO L226 Difference]: Without dead ends: 83417 [2022-01-18 14:48:03,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2022-01-18 14:48:03,891 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 312 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:48:03,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 492 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:48:03,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83417 states. [2022-01-18 14:48:05,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83417 to 51969. [2022-01-18 14:48:05,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51969 states, 51968 states have (on average 4.574911483990148) internal successors, (237749), 51968 states have internal predecessors, (237749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:48:05,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51969 states to 51969 states and 237749 transitions. [2022-01-18 14:48:05,675 INFO L78 Accepts]: Start accepts. Automaton has 51969 states and 237749 transitions. Word has length 29 [2022-01-18 14:48:05,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:48:05,675 INFO L470 AbstractCegarLoop]: Abstraction has 51969 states and 237749 transitions. [2022-01-18 14:48:05,676 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 14:48:05,676 INFO L276 IsEmpty]: Start isEmpty. Operand 51969 states and 237749 transitions. [2022-01-18 14:48:05,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:48:05,805 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:48:05,805 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:48:05,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-01-18 14:48:06,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:48:06,005 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:48:06,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:48:06,006 INFO L85 PathProgramCache]: Analyzing trace with hash 944500301, now seen corresponding path program 22 times [2022-01-18 14:48:06,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:48:06,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790526265] [2022-01-18 14:48:06,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:48:06,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:48:06,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:48:06,033 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:48:06,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:48:06,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790526265] [2022-01-18 14:48:06,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790526265] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:48:06,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634066161] [2022-01-18 14:48:06,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:48:06,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:48:06,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:48:06,034 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:48:06,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 14:48:06,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:48:06,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:48:06,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:48:06,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:48:06,136 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:48:06,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:48:06,180 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:48:06,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634066161] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:48:06,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:48:06,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 10 [2022-01-18 14:48:06,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391824777] [2022-01-18 14:48:06,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:48:06,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:48:06,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:48:06,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:48:06,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:48:06,181 INFO L87 Difference]: Start difference. First operand 51969 states and 237749 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 14:48:07,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:48:07,570 INFO L93 Difference]: Finished difference Result 99551 states and 429052 transitions. [2022-01-18 14:48:07,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 14:48:07,570 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 29 [2022-01-18 14:48:07,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:48:08,003 INFO L225 Difference]: With dead ends: 99551 [2022-01-18 14:48:08,004 INFO L226 Difference]: Without dead ends: 99551 [2022-01-18 14:48:08,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2022-01-18 14:48:08,006 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 440 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:48:08,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 390 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:48:08,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99551 states. [2022-01-18 14:48:10,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99551 to 52207. [2022-01-18 14:48:10,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52207 states, 52206 states have (on average 4.573401524728959) internal successors, (238759), 52206 states have internal predecessors, (238759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:48:10,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52207 states to 52207 states and 238759 transitions. [2022-01-18 14:48:10,305 INFO L78 Accepts]: Start accepts. Automaton has 52207 states and 238759 transitions. Word has length 29 [2022-01-18 14:48:10,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:48:10,305 INFO L470 AbstractCegarLoop]: Abstraction has 52207 states and 238759 transitions. [2022-01-18 14:48:10,305 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 14:48:10,305 INFO L276 IsEmpty]: Start isEmpty. Operand 52207 states and 238759 transitions. [2022-01-18 14:48:10,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:48:10,431 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:48:10,431 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:48:10,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-01-18 14:48:10,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-01-18 14:48:10,631 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:48:10,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:48:10,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1933966981, now seen corresponding path program 23 times [2022-01-18 14:48:10,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:48:10,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944620713] [2022-01-18 14:48:10,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:48:10,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:48:10,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:48:10,653 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:48:10,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:48:10,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944620713] [2022-01-18 14:48:10,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944620713] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:48:10,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730977019] [2022-01-18 14:48:10,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:48:10,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:48:10,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:48:10,655 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:48:10,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 14:48:10,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 14:48:10,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:48:10,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:48:10,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:48:10,760 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:48:10,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:48:10,809 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:48:10,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730977019] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:48:10,809 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:48:10,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 10 [2022-01-18 14:48:10,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020085811] [2022-01-18 14:48:10,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:48:10,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:48:10,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:48:10,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:48:10,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:48:10,810 INFO L87 Difference]: Start difference. First operand 52207 states and 238759 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 14:48:12,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:48:12,203 INFO L93 Difference]: Finished difference Result 93968 states and 402691 transitions. [2022-01-18 14:48:12,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 14:48:12,204 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 29 [2022-01-18 14:48:12,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:48:12,610 INFO L225 Difference]: With dead ends: 93968 [2022-01-18 14:48:12,610 INFO L226 Difference]: Without dead ends: 93918 [2022-01-18 14:48:12,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2022-01-18 14:48:12,610 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 414 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:48:12,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 319 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:48:12,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93918 states. [2022-01-18 14:48:14,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93918 to 52209. [2022-01-18 14:48:14,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52209 states, 52208 states have (on average 4.573207171314741) internal successors, (238758), 52208 states have internal predecessors, (238758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:48:14,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52209 states to 52209 states and 238758 transitions. [2022-01-18 14:48:14,983 INFO L78 Accepts]: Start accepts. Automaton has 52209 states and 238758 transitions. Word has length 29 [2022-01-18 14:48:14,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:48:14,983 INFO L470 AbstractCegarLoop]: Abstraction has 52209 states and 238758 transitions. [2022-01-18 14:48:14,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 14:48:14,983 INFO L276 IsEmpty]: Start isEmpty. Operand 52209 states and 238758 transitions. [2022-01-18 14:48:15,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:48:15,118 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:48:15,118 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:48:15,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-01-18 14:48:15,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:48:15,318 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:48:15,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:48:15,319 INFO L85 PathProgramCache]: Analyzing trace with hash 70245641, now seen corresponding path program 24 times [2022-01-18 14:48:15,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:48:15,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95033308] [2022-01-18 14:48:15,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:48:15,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:48:15,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:48:15,359 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:48:15,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:48:15,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95033308] [2022-01-18 14:48:15,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95033308] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:48:15,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019821178] [2022-01-18 14:48:15,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:48:15,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:48:15,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:48:15,361 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:48:15,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 14:48:15,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 14:48:15,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:48:15,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:48:15,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:48:15,465 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:48:15,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:48:15,514 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:48:15,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019821178] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:48:15,514 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:48:15,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11 [2022-01-18 14:48:15,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236376296] [2022-01-18 14:48:15,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:48:15,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:48:15,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:48:15,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:48:15,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:48:15,515 INFO L87 Difference]: Start difference. First operand 52209 states and 238758 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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 14:48:17,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:48:17,055 INFO L93 Difference]: Finished difference Result 86954 states and 378394 transitions. [2022-01-18 14:48:17,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 14:48:17,056 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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 29 [2022-01-18 14:48:17,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:48:17,463 INFO L225 Difference]: With dead ends: 86954 [2022-01-18 14:48:17,463 INFO L226 Difference]: Without dead ends: 86954 [2022-01-18 14:48:17,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 14:48:17,463 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 416 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:48:17,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 419 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:48:17,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86954 states. [2022-01-18 14:48:19,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86954 to 49798. [2022-01-18 14:48:19,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49798 states, 49797 states have (on average 4.546077072916039) internal successors, (226381), 49797 states have internal predecessors, (226381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:48:19,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49798 states to 49798 states and 226381 transitions. [2022-01-18 14:48:19,316 INFO L78 Accepts]: Start accepts. Automaton has 49798 states and 226381 transitions. Word has length 29 [2022-01-18 14:48:19,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:48:19,317 INFO L470 AbstractCegarLoop]: Abstraction has 49798 states and 226381 transitions. [2022-01-18 14:48:19,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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 14:48:19,317 INFO L276 IsEmpty]: Start isEmpty. Operand 49798 states and 226381 transitions. [2022-01-18 14:48:19,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:48:19,439 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:48:19,439 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:48:19,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-01-18 14:48:19,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-01-18 14:48:19,643 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:48:19,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:48:19,644 INFO L85 PathProgramCache]: Analyzing trace with hash 936509879, now seen corresponding path program 25 times [2022-01-18 14:48:19,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:48:19,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217170604] [2022-01-18 14:48:19,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:48:19,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:48:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:48:19,669 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:48:19,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:48:19,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217170604] [2022-01-18 14:48:19,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217170604] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:48:19,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249703983] [2022-01-18 14:48:19,670 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:48:19,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:48:19,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:48:19,671 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:48:19,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 14:48:19,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:48:19,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:48:19,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:48:19,771 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:48:19,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:48:19,815 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:48:19,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249703983] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:48:19,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:48:19,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11 [2022-01-18 14:48:19,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846716515] [2022-01-18 14:48:19,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:48:19,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:48:19,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:48:19,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:48:19,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:48:19,816 INFO L87 Difference]: Start difference. First operand 49798 states and 226381 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 14:48:21,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:48:21,045 INFO L93 Difference]: Finished difference Result 80496 states and 344078 transitions. [2022-01-18 14:48:21,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 14:48:21,045 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 29 [2022-01-18 14:48:21,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:48:21,365 INFO L225 Difference]: With dead ends: 80496 [2022-01-18 14:48:21,365 INFO L226 Difference]: Without dead ends: 80421 [2022-01-18 14:48:21,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:48:21,366 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 376 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:48:21,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 379 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:48:21,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80421 states. [2022-01-18 14:48:22,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80421 to 50365. [2022-01-18 14:48:22,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50365 states, 50364 states have (on average 4.546441902946549) internal successors, (228977), 50364 states have internal predecessors, (228977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:48:23,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50365 states to 50365 states and 228977 transitions. [2022-01-18 14:48:23,321 INFO L78 Accepts]: Start accepts. Automaton has 50365 states and 228977 transitions. Word has length 29 [2022-01-18 14:48:23,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:48:23,321 INFO L470 AbstractCegarLoop]: Abstraction has 50365 states and 228977 transitions. [2022-01-18 14:48:23,321 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 14:48:23,321 INFO L276 IsEmpty]: Start isEmpty. Operand 50365 states and 228977 transitions. [2022-01-18 14:48:23,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:48:23,433 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:48:23,433 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:48:23,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-01-18 14:48:23,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-01-18 14:48:23,633 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:48:23,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:48:23,634 INFO L85 PathProgramCache]: Analyzing trace with hash -468416107, now seen corresponding path program 26 times [2022-01-18 14:48:23,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:48:23,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560365136] [2022-01-18 14:48:23,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:48:23,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:48:23,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:48:23,660 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:48:23,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:48:23,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560365136] [2022-01-18 14:48:23,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560365136] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:48:23,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322002272] [2022-01-18 14:48:23,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:48:23,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:48:23,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:48:23,662 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:48:23,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 14:48:23,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:48:23,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:48:23,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:48:23,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:48:23,758 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:48:23,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:48:23,800 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:48:23,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322002272] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:48:23,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:48:23,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11 [2022-01-18 14:48:23,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906151746] [2022-01-18 14:48:23,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:48:23,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:48:23,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:48:23,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:48:23,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:48:23,801 INFO L87 Difference]: Start difference. First operand 50365 states and 228977 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 14:48:25,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:48:25,304 INFO L93 Difference]: Finished difference Result 99418 states and 427978 transitions. [2022-01-18 14:48:25,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 14:48:25,304 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 29 [2022-01-18 14:48:25,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:48:25,779 INFO L225 Difference]: With dead ends: 99418 [2022-01-18 14:48:25,780 INFO L226 Difference]: Without dead ends: 99418 [2022-01-18 14:48:25,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 14:48:25,780 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 415 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:48:25,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 348 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:48:25,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99418 states. [2022-01-18 14:48:27,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99418 to 48495. [2022-01-18 14:48:27,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48495 states, 48494 states have (on average 4.518827071390275) internal successors, (219136), 48494 states have internal predecessors, (219136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:48:27,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48495 states to 48495 states and 219136 transitions. [2022-01-18 14:48:27,565 INFO L78 Accepts]: Start accepts. Automaton has 48495 states and 219136 transitions. Word has length 29 [2022-01-18 14:48:27,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:48:27,565 INFO L470 AbstractCegarLoop]: Abstraction has 48495 states and 219136 transitions. [2022-01-18 14:48:27,565 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 14:48:27,566 INFO L276 IsEmpty]: Start isEmpty. Operand 48495 states and 219136 transitions. [2022-01-18 14:48:27,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:48:27,672 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:48:27,672 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:48:27,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-01-18 14:48:27,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:48:27,874 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:48:27,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:48:27,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1517969131, now seen corresponding path program 27 times [2022-01-18 14:48:27,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:48:27,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677823141] [2022-01-18 14:48:27,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:48:27,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:48:27,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:48:27,914 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:48:27,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:48:27,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677823141] [2022-01-18 14:48:27,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677823141] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:48:27,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416600196] [2022-01-18 14:48:27,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:48:27,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:48:27,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:48:27,916 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:48:27,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 14:48:27,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 14:48:27,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:48:27,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:48:27,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:48:28,347 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:48:28,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:48:28,411 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:48:28,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416600196] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:48:28,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:48:28,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 11 [2022-01-18 14:48:28,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089545279] [2022-01-18 14:48:28,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:48:28,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 14:48:28,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:48:28,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 14:48:28,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-18 14:48:28,412 INFO L87 Difference]: Start difference. First operand 48495 states and 219136 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 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 14:48:29,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:48:29,238 INFO L93 Difference]: Finished difference Result 69880 states and 298246 transitions. [2022-01-18 14:48:29,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 14:48:29,239 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 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 29 [2022-01-18 14:48:29,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:48:29,502 INFO L225 Difference]: With dead ends: 69880 [2022-01-18 14:48:29,502 INFO L226 Difference]: Without dead ends: 69808 [2022-01-18 14:48:29,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:48:29,503 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 389 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:48:29,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 348 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:48:29,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69808 states. [2022-01-18 14:48:30,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69808 to 47135. [2022-01-18 14:48:30,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47135 states, 47134 states have (on average 4.529511605210676) internal successors, (213494), 47134 states have internal predecessors, (213494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:48:30,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47135 states to 47135 states and 213494 transitions. [2022-01-18 14:48:30,954 INFO L78 Accepts]: Start accepts. Automaton has 47135 states and 213494 transitions. Word has length 29 [2022-01-18 14:48:30,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:48:30,954 INFO L470 AbstractCegarLoop]: Abstraction has 47135 states and 213494 transitions. [2022-01-18 14:48:30,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 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 14:48:30,955 INFO L276 IsEmpty]: Start isEmpty. Operand 47135 states and 213494 transitions. [2022-01-18 14:48:31,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:48:31,322 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:48:31,322 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:48:31,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-01-18 14:48:31,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:48:31,522 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:48:31,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:48:31,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1260692049, now seen corresponding path program 28 times [2022-01-18 14:48:31,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:48:31,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880360429] [2022-01-18 14:48:31,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:48:31,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:48:31,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:48:31,546 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:48:31,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:48:31,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880360429] [2022-01-18 14:48:31,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880360429] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:48:31,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418712556] [2022-01-18 14:48:31,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:48:31,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:48:31,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:48:31,548 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:48:31,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 14:48:31,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:48:31,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:48:31,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:48:31,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:48:31,649 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:48:31,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:48:31,711 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:48:31,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418712556] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:48:31,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:48:31,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9 [2022-01-18 14:48:31,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532180726] [2022-01-18 14:48:31,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:48:31,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:48:31,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:48:31,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:48:31,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:48:31,712 INFO L87 Difference]: Start difference. First operand 47135 states and 213494 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 14:48:32,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:48:32,645 INFO L93 Difference]: Finished difference Result 89708 states and 381495 transitions. [2022-01-18 14:48:32,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 14:48:32,646 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 29 [2022-01-18 14:48:32,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:48:33,022 INFO L225 Difference]: With dead ends: 89708 [2022-01-18 14:48:33,022 INFO L226 Difference]: Without dead ends: 89708 [2022-01-18 14:48:33,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2022-01-18 14:48:33,022 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 444 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:48:33,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 238 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:48:33,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89708 states. [2022-01-18 14:48:34,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89708 to 50510. [2022-01-18 14:48:34,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50510 states, 50509 states have (on average 4.561880060979232) internal successors, (230416), 50509 states have internal predecessors, (230416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:48:34,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50510 states to 50510 states and 230416 transitions. [2022-01-18 14:48:34,948 INFO L78 Accepts]: Start accepts. Automaton has 50510 states and 230416 transitions. Word has length 29 [2022-01-18 14:48:34,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:48:34,948 INFO L470 AbstractCegarLoop]: Abstraction has 50510 states and 230416 transitions. [2022-01-18 14:48:34,948 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 14:48:34,948 INFO L276 IsEmpty]: Start isEmpty. Operand 50510 states and 230416 transitions. [2022-01-18 14:48:35,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:48:35,083 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:48:35,083 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:48:35,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-01-18 14:48:35,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-01-18 14:48:35,283 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:48:35,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:48:35,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1022728657, now seen corresponding path program 29 times [2022-01-18 14:48:35,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:48:35,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429967299] [2022-01-18 14:48:35,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:48:35,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:48:35,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:48:35,322 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:48:35,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:48:35,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429967299] [2022-01-18 14:48:35,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429967299] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:48:35,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071043077] [2022-01-18 14:48:35,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:48:35,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:48:35,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:48:35,324 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:48:35,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-18 14:48:35,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:48:35,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:48:35,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:48:35,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:48:35,415 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:48:35,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:48:35,461 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:48:35,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071043077] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:48:35,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:48:35,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9 [2022-01-18 14:48:35,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045083219] [2022-01-18 14:48:35,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:48:35,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:48:35,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:48:35,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:48:35,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:48:35,462 INFO L87 Difference]: Start difference. First operand 50510 states and 230416 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 14:48:36,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:48:36,569 INFO L93 Difference]: Finished difference Result 67513 states and 293577 transitions. [2022-01-18 14:48:36,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 14:48:36,570 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 29 [2022-01-18 14:48:36,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:48:36,867 INFO L225 Difference]: With dead ends: 67513 [2022-01-18 14:48:36,867 INFO L226 Difference]: Without dead ends: 67489 [2022-01-18 14:48:36,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2022-01-18 14:48:36,867 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 223 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:48:36,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 380 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:48:36,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67489 states. [2022-01-18 14:48:38,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67489 to 50508. [2022-01-18 14:48:38,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50508 states, 50507 states have (on average 4.561565723563071) internal successors, (230391), 50507 states have internal predecessors, (230391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:48:38,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50508 states to 50508 states and 230391 transitions. [2022-01-18 14:48:38,374 INFO L78 Accepts]: Start accepts. Automaton has 50508 states and 230391 transitions. Word has length 29 [2022-01-18 14:48:38,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:48:38,374 INFO L470 AbstractCegarLoop]: Abstraction has 50508 states and 230391 transitions. [2022-01-18 14:48:38,374 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 14:48:38,374 INFO L276 IsEmpty]: Start isEmpty. Operand 50508 states and 230391 transitions. [2022-01-18 14:48:38,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:48:38,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:48:38,495 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:48:38,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-01-18 14:48:38,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-01-18 14:48:38,696 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:48:38,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:48:38,696 INFO L85 PathProgramCache]: Analyzing trace with hash -657767983, now seen corresponding path program 30 times [2022-01-18 14:48:38,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:48:38,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157129683] [2022-01-18 14:48:38,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:48:38,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:48:38,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:48:38,718 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:48:38,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:48:38,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157129683] [2022-01-18 14:48:38,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157129683] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:48:38,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316416644] [2022-01-18 14:48:38,718 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:48:38,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:48:38,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:48:38,719 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:48:38,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-18 14:48:38,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 14:48:38,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:48:38,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:48:38,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:48:38,800 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:48:38,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:48:38,843 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:48:38,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316416644] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:48:38,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:48:38,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9 [2022-01-18 14:48:38,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663903895] [2022-01-18 14:48:38,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:48:38,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:48:38,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:48:38,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:48:38,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:48:38,844 INFO L87 Difference]: Start difference. First operand 50508 states and 230391 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 14:48:40,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:48:40,189 INFO L93 Difference]: Finished difference Result 77373 states and 335751 transitions. [2022-01-18 14:48:40,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 14:48:40,190 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 29 [2022-01-18 14:48:40,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:48:40,520 INFO L225 Difference]: With dead ends: 77373 [2022-01-18 14:48:40,520 INFO L226 Difference]: Without dead ends: 77373 [2022-01-18 14:48:40,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2022-01-18 14:48:40,520 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 280 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:48:40,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 431 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:48:40,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77373 states. [2022-01-18 14:48:41,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77373 to 50746. [2022-01-18 14:48:42,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50746 states, 50745 states have (on average 4.560074884225047) internal successors, (231401), 50745 states have internal predecessors, (231401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:48:42,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50746 states to 50746 states and 231401 transitions. [2022-01-18 14:48:42,229 INFO L78 Accepts]: Start accepts. Automaton has 50746 states and 231401 transitions. Word has length 29 [2022-01-18 14:48:42,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:48:42,229 INFO L470 AbstractCegarLoop]: Abstraction has 50746 states and 231401 transitions. [2022-01-18 14:48:42,229 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 14:48:42,229 INFO L276 IsEmpty]: Start isEmpty. Operand 50746 states and 231401 transitions. [2022-01-18 14:48:42,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:48:42,352 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:48:42,352 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:48:42,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-01-18 14:48:42,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:48:42,553 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:48:42,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:48:42,553 INFO L85 PathProgramCache]: Analyzing trace with hash 331698697, now seen corresponding path program 31 times [2022-01-18 14:48:42,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:48:42,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796849544] [2022-01-18 14:48:42,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:48:42,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:48:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:48:42,581 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:48:42,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:48:42,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796849544] [2022-01-18 14:48:42,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796849544] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:48:42,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416970074] [2022-01-18 14:48:42,581 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:48:42,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:48:42,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:48:42,582 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:48:42,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-18 14:48:42,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:48:42,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:48:42,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:48:42,667 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:48:42,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:48:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:48:42,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416970074] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:48:42,711 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:48:42,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 9 [2022-01-18 14:48:42,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309714890] [2022-01-18 14:48:42,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:48:42,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:48:42,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:48:42,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:48:42,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:48:42,712 INFO L87 Difference]: Start difference. First operand 50746 states and 231401 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:48:43,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:48:43,871 INFO L93 Difference]: Finished difference Result 86093 states and 364091 transitions. [2022-01-18 14:48:43,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 14:48:43,871 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 14:48:43,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:48:44,230 INFO L225 Difference]: With dead ends: 86093 [2022-01-18 14:48:44,230 INFO L226 Difference]: Without dead ends: 86068 [2022-01-18 14:48:44,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2022-01-18 14:48:44,230 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 453 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:48:44,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 285 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:48:44,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86068 states. [2022-01-18 14:48:45,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86068 to 50746. [2022-01-18 14:48:45,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50746 states, 50745 states have (on average 4.559838407724899) internal successors, (231389), 50745 states have internal predecessors, (231389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:48:46,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50746 states to 50746 states and 231389 transitions. [2022-01-18 14:48:46,256 INFO L78 Accepts]: Start accepts. Automaton has 50746 states and 231389 transitions. Word has length 29 [2022-01-18 14:48:46,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:48:46,256 INFO L470 AbstractCegarLoop]: Abstraction has 50746 states and 231389 transitions. [2022-01-18 14:48:46,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:48:46,256 INFO L276 IsEmpty]: Start isEmpty. Operand 50746 states and 231389 transitions. [2022-01-18 14:48:46,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:48:46,383 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:48:46,383 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:48:46,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-01-18 14:48:46,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:48:46,591 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:48:46,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:48:46,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1532022643, now seen corresponding path program 32 times [2022-01-18 14:48:46,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:48:46,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904998911] [2022-01-18 14:48:46,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:48:46,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:48:46,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:48:46,618 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:48:46,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:48:46,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904998911] [2022-01-18 14:48:46,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904998911] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:48:46,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582344141] [2022-01-18 14:48:46,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 14:48:46,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:48:46,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:48:46,620 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:48:46,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-18 14:48:46,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 14:48:46,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:48:46,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:48:46,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:48:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:48:46,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:48:46,768 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:48:46,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582344141] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:48:46,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:48:46,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-01-18 14:48:46,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694791951] [2022-01-18 14:48:46,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:48:46,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:48:46,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:48:46,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:48:46,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:48:46,770 INFO L87 Difference]: Start difference. First operand 50746 states and 231389 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 14:48:48,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:48:48,856 INFO L93 Difference]: Finished difference Result 110373 states and 481503 transitions. [2022-01-18 14:48:48,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 14:48:48,857 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 29 [2022-01-18 14:48:48,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:48:49,387 INFO L225 Difference]: With dead ends: 110373 [2022-01-18 14:48:49,387 INFO L226 Difference]: Without dead ends: 110373 [2022-01-18 14:48:49,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=565, Invalid=2191, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 14:48:49,388 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 478 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:48:49,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 577 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1260 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:48:49,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110373 states. [2022-01-18 14:48:51,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110373 to 51698. [2022-01-18 14:48:51,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51698 states, 51697 states have (on average 4.5540166740816685) internal successors, (235429), 51697 states have internal predecessors, (235429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:48:51,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51698 states to 51698 states and 235429 transitions. [2022-01-18 14:48:51,725 INFO L78 Accepts]: Start accepts. Automaton has 51698 states and 235429 transitions. Word has length 29 [2022-01-18 14:48:51,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:48:51,726 INFO L470 AbstractCegarLoop]: Abstraction has 51698 states and 235429 transitions. [2022-01-18 14:48:51,726 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 14:48:51,726 INFO L276 IsEmpty]: Start isEmpty. Operand 51698 states and 235429 transitions. [2022-01-18 14:48:51,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:48:51,880 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:48:51,880 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:48:51,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-01-18 14:48:52,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-01-18 14:48:52,080 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:48:52,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:48:52,081 INFO L85 PathProgramCache]: Analyzing trace with hash -665758405, now seen corresponding path program 33 times [2022-01-18 14:48:52,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:48:52,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847869199] [2022-01-18 14:48:52,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:48:52,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:48:52,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:48:52,103 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:48:52,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:48:52,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847869199] [2022-01-18 14:48:52,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847869199] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:48:52,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169888400] [2022-01-18 14:48:52,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 14:48:52,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:48:52,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:48:52,105 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:48:52,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-18 14:48:52,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 14:48:52,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:48:52,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:48:52,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:48:52,194 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:48:52,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:48:52,240 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:48:52,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169888400] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:48:52,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:48:52,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-01-18 14:48:52,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608352959] [2022-01-18 14:48:52,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:48:52,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:48:52,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:48:52,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:48:52,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:48:52,241 INFO L87 Difference]: Start difference. First operand 51698 states and 235429 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:48:53,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:48:53,302 INFO L93 Difference]: Finished difference Result 100748 states and 423395 transitions. [2022-01-18 14:48:53,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 14:48:53,302 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 14:48:53,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:48:54,109 INFO L225 Difference]: With dead ends: 100748 [2022-01-18 14:48:54,109 INFO L226 Difference]: Without dead ends: 100498 [2022-01-18 14:48:54,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=956, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 14:48:54,109 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 435 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:48:54,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 414 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:48:54,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100498 states. [2022-01-18 14:48:55,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100498 to 51700. [2022-01-18 14:48:55,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51700 states, 51699 states have (on average 4.553163504129674) internal successors, (235394), 51699 states have internal predecessors, (235394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:48:55,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51700 states to 51700 states and 235394 transitions. [2022-01-18 14:48:55,887 INFO L78 Accepts]: Start accepts. Automaton has 51700 states and 235394 transitions. Word has length 29 [2022-01-18 14:48:55,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:48:55,887 INFO L470 AbstractCegarLoop]: Abstraction has 51700 states and 235394 transitions. [2022-01-18 14:48:55,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:48:55,887 INFO L276 IsEmpty]: Start isEmpty. Operand 51700 states and 235394 transitions. [2022-01-18 14:48:56,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:48:56,015 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:48:56,015 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:48:56,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-01-18 14:48:56,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:48:56,215 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:48:56,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:48:56,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1816433037, now seen corresponding path program 34 times [2022-01-18 14:48:56,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:48:56,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214501297] [2022-01-18 14:48:56,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:48:56,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:48:56,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:48:56,243 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:48:56,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:48:56,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214501297] [2022-01-18 14:48:56,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214501297] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:48:56,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427558870] [2022-01-18 14:48:56,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:48:56,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:48:56,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:48:56,244 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:48:56,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-18 14:48:56,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:48:56,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:48:56,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:48:56,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:48:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:48:56,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:48:56,394 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:48:56,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427558870] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:48:56,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:48:56,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 14:48:56,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052672587] [2022-01-18 14:48:56,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:48:56,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:48:56,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:48:56,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:48:56,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:48:56,395 INFO L87 Difference]: Start difference. First operand 51700 states and 235394 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 14:48:58,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:48:58,262 INFO L93 Difference]: Finished difference Result 96462 states and 425424 transitions. [2022-01-18 14:48:58,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 14:48:58,262 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 29 [2022-01-18 14:48:58,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:48:58,687 INFO L225 Difference]: With dead ends: 96462 [2022-01-18 14:48:58,687 INFO L226 Difference]: Without dead ends: 96437 [2022-01-18 14:48:58,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 14:48:58,688 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 248 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 1520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 14:48:58,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 654 Invalid, 1520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 14:48:58,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96437 states. [2022-01-18 14:49:00,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96437 to 53421. [2022-01-18 14:49:00,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53421 states, 53420 states have (on average 4.527517783601647) internal successors, (241860), 53420 states have internal predecessors, (241860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:00,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53421 states to 53421 states and 241860 transitions. [2022-01-18 14:49:00,993 INFO L78 Accepts]: Start accepts. Automaton has 53421 states and 241860 transitions. Word has length 29 [2022-01-18 14:49:00,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:00,993 INFO L470 AbstractCegarLoop]: Abstraction has 53421 states and 241860 transitions. [2022-01-18 14:49:00,993 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 14:49:00,993 INFO L276 IsEmpty]: Start isEmpty. Operand 53421 states and 241860 transitions. [2022-01-18 14:49:01,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 14:49:01,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:01,126 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:01,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-01-18 14:49:01,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:01,327 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:49:01,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:01,327 INFO L85 PathProgramCache]: Analyzing trace with hash 303066167, now seen corresponding path program 35 times [2022-01-18 14:49:01,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:01,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350956008] [2022-01-18 14:49:01,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:01,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:01,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:01,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:01,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350956008] [2022-01-18 14:49:01,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350956008] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:49:01,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475159336] [2022-01-18 14:49:01,354 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:49:01,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:01,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:01,355 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:49:01,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-18 14:49:01,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 14:49:01,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:49:01,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 14:49:01,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:49:01,445 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:01,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:49:01,505 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:01,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475159336] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:49:01,505 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:49:01,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 14:49:01,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857145929] [2022-01-18 14:49:01,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:49:01,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:49:01,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:01,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:49:01,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:49:01,506 INFO L87 Difference]: Start difference. First operand 53421 states and 241860 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 14:49:02,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:02,474 INFO L93 Difference]: Finished difference Result 84563 states and 356651 transitions. [2022-01-18 14:49:02,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 14:49:02,475 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 29 [2022-01-18 14:49:02,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:03,244 INFO L225 Difference]: With dead ends: 84563 [2022-01-18 14:49:03,244 INFO L226 Difference]: Without dead ends: 84422 [2022-01-18 14:49:03,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 14:49:03,244 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 480 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:03,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 292 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 14:49:03,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84422 states. [2022-01-18 14:49:04,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84422 to 54317. [2022-01-18 14:49:04,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54317 states, 54316 states have (on average 4.513716032108403) internal successors, (245167), 54316 states have internal predecessors, (245167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:04,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54317 states to 54317 states and 245167 transitions. [2022-01-18 14:49:04,961 INFO L78 Accepts]: Start accepts. Automaton has 54317 states and 245167 transitions. Word has length 29 [2022-01-18 14:49:04,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:04,961 INFO L470 AbstractCegarLoop]: Abstraction has 54317 states and 245167 transitions. [2022-01-18 14:49:04,961 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 14:49:04,961 INFO L276 IsEmpty]: Start isEmpty. Operand 54317 states and 245167 transitions. [2022-01-18 14:49:05,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 14:49:05,103 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:05,103 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:05,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-01-18 14:49:05,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:05,304 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:49:05,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:05,304 INFO L85 PathProgramCache]: Analyzing trace with hash 971511529, now seen corresponding path program 36 times [2022-01-18 14:49:05,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:05,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487605552] [2022-01-18 14:49:05,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:05,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:05,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:05,366 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:05,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:05,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487605552] [2022-01-18 14:49:05,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487605552] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:49:05,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723749614] [2022-01-18 14:49:05,367 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:49:05,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:05,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:05,371 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:49:05,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-18 14:49:05,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 14:49:05,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:49:05,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:49:05,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:49:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:05,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:49:05,769 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:05,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723749614] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:49:05,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:49:05,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 5] total 8 [2022-01-18 14:49:05,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958833267] [2022-01-18 14:49:05,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:49:05,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 14:49:05,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:05,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 14:49:05,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:49:05,770 INFO L87 Difference]: Start difference. First operand 54317 states and 245167 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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 14:49:06,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:06,857 INFO L93 Difference]: Finished difference Result 56833 states and 254304 transitions. [2022-01-18 14:49:06,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 14:49:06,857 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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 31 [2022-01-18 14:49:06,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:07,112 INFO L225 Difference]: With dead ends: 56833 [2022-01-18 14:49:07,112 INFO L226 Difference]: Without dead ends: 56765 [2022-01-18 14:49:07,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 10 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-18 14:49:07,112 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 95 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:07,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 178 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 14:49:07,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56765 states. [2022-01-18 14:49:08,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56765 to 55387. [2022-01-18 14:49:08,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55387 states, 55386 states have (on average 4.503304084064565) internal successors, (249420), 55386 states have internal predecessors, (249420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:08,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55387 states to 55387 states and 249420 transitions. [2022-01-18 14:49:08,700 INFO L78 Accepts]: Start accepts. Automaton has 55387 states and 249420 transitions. Word has length 31 [2022-01-18 14:49:08,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:08,700 INFO L470 AbstractCegarLoop]: Abstraction has 55387 states and 249420 transitions. [2022-01-18 14:49:08,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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 14:49:08,700 INFO L276 IsEmpty]: Start isEmpty. Operand 55387 states and 249420 transitions. [2022-01-18 14:49:08,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 14:49:08,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:08,836 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:49:08,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-01-18 14:49:09,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-01-18 14:49:09,037 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:49:09,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:09,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1033676257, now seen corresponding path program 37 times [2022-01-18 14:49:09,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:09,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711511872] [2022-01-18 14:49:09,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:09,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:09,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:09,101 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:49:09,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:09,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711511872] [2022-01-18 14:49:09,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711511872] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:49:09,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411934465] [2022-01-18 14:49:09,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 14:49:09,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:09,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:09,102 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:49:09,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-18 14:49:09,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:09,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:49:09,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:49:09,781 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:09,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:49:09,914 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 14:49:09,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411934465] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:49:09,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:49:09,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 5] total 9 [2022-01-18 14:49:09,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284530498] [2022-01-18 14:49:09,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:49:09,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:49:09,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:09,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:49:09,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:49:09,915 INFO L87 Difference]: Start difference. First operand 55387 states and 249420 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 14:49:10,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:10,653 INFO L93 Difference]: Finished difference Result 57655 states and 257614 transitions. [2022-01-18 14:49:10,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:49:10,653 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 31 [2022-01-18 14:49:10,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:10,878 INFO L225 Difference]: With dead ends: 57655 [2022-01-18 14:49:10,878 INFO L226 Difference]: Without dead ends: 57519 [2022-01-18 14:49:10,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 11 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:49:10,878 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 119 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:10,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 205 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:49:10,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57519 states. [2022-01-18 14:49:12,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57519 to 55763. [2022-01-18 14:49:12,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55763 states, 55762 states have (on average 4.50256447042789) internal successors, (251072), 55762 states have internal predecessors, (251072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:12,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55763 states to 55763 states and 251072 transitions. [2022-01-18 14:49:12,372 INFO L78 Accepts]: Start accepts. Automaton has 55763 states and 251072 transitions. Word has length 31 [2022-01-18 14:49:12,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:12,372 INFO L470 AbstractCegarLoop]: Abstraction has 55763 states and 251072 transitions. [2022-01-18 14:49:12,372 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 14:49:12,372 INFO L276 IsEmpty]: Start isEmpty. Operand 55763 states and 251072 transitions. [2022-01-18 14:49:12,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 14:49:12,799 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:12,799 INFO L514 BasicCegarLoop]: trace histogram [2, 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, 1] [2022-01-18 14:49:12,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-01-18 14:49:12,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-01-18 14:49:12,999 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:49:12,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:13,000 INFO L85 PathProgramCache]: Analyzing trace with hash 351590437, now seen corresponding path program 10 times [2022-01-18 14:49:13,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:13,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298110626] [2022-01-18 14:49:13,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:13,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:13,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:13,073 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 14:49:13,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:13,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298110626] [2022-01-18 14:49:13,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298110626] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:49:13,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509025080] [2022-01-18 14:49:13,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 14:49:13,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:13,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:13,074 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:49:13,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-18 14:49:13,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 14:49:13,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:49:13,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:49:13,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:49:13,403 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 14:49:13,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:49:13,555 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 14:49:13,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509025080] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:49:13,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:49:13,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 10 [2022-01-18 14:49:13,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597073591] [2022-01-18 14:49:13,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:49:13,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 14:49:13,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:13,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 14:49:13,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:49:13,556 INFO L87 Difference]: Start difference. First operand 55763 states and 251072 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 14:49:14,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:14,332 INFO L93 Difference]: Finished difference Result 57519 states and 257238 transitions. [2022-01-18 14:49:14,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 14:49:14,332 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 31 [2022-01-18 14:49:14,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:14,545 INFO L225 Difference]: With dead ends: 57519 [2022-01-18 14:49:14,545 INFO L226 Difference]: Without dead ends: 57055 [2022-01-18 14:49:14,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 11 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-01-18 14:49:14,545 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 83 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:14,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 217 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 14:49:14,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57055 states. [2022-01-18 14:49:15,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57055 to 56239. [2022-01-18 14:49:15,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56239 states, 56238 states have (on average 4.491767132543831) internal successors, (252608), 56238 states have internal predecessors, (252608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:16,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56239 states to 56239 states and 252608 transitions. [2022-01-18 14:49:16,343 INFO L78 Accepts]: Start accepts. Automaton has 56239 states and 252608 transitions. Word has length 31 [2022-01-18 14:49:16,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:16,343 INFO L470 AbstractCegarLoop]: Abstraction has 56239 states and 252608 transitions. [2022-01-18 14:49:16,343 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 14:49:16,343 INFO L276 IsEmpty]: Start isEmpty. Operand 56239 states and 252608 transitions. [2022-01-18 14:49:16,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 14:49:16,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:16,482 INFO L514 BasicCegarLoop]: trace histogram [2, 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, 1] [2022-01-18 14:49:16,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-01-18 14:49:16,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-01-18 14:49:16,683 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:49:16,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:16,683 INFO L85 PathProgramCache]: Analyzing trace with hash 948873901, now seen corresponding path program 11 times [2022-01-18 14:49:16,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:16,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182732008] [2022-01-18 14:49:16,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:16,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:16,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:16,747 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:49:16,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:16,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182732008] [2022-01-18 14:49:16,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182732008] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:49:16,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68872868] [2022-01-18 14:49:16,748 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 14:49:16,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:16,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:16,749 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:49:16,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-18 14:49:16,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 14:49:16,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:49:16,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:49:16,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:49:17,072 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 14:49:17,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:49:17,202 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 14:49:17,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68872868] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:49:17,202 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:49:17,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 5] total 9 [2022-01-18 14:49:17,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333773205] [2022-01-18 14:49:17,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:49:17,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:49:17,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:17,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:49:17,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:49:17,203 INFO L87 Difference]: Start difference. First operand 56239 states and 252608 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 14:49:17,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:17,877 INFO L93 Difference]: Finished difference Result 57673 states and 257758 transitions. [2022-01-18 14:49:17,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:49:17,877 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 31 [2022-01-18 14:49:17,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:18,107 INFO L225 Difference]: With dead ends: 57673 [2022-01-18 14:49:18,108 INFO L226 Difference]: Without dead ends: 57311 [2022-01-18 14:49:18,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 11 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:49:18,108 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 90 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:18,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 168 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:49:18,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57311 states. [2022-01-18 14:49:19,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57311 to 56439. [2022-01-18 14:49:19,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56439 states, 56438 states have (on average 4.494454091215139) internal successors, (253658), 56438 states have internal predecessors, (253658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:19,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56439 states to 56439 states and 253658 transitions. [2022-01-18 14:49:19,890 INFO L78 Accepts]: Start accepts. Automaton has 56439 states and 253658 transitions. Word has length 31 [2022-01-18 14:49:19,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:19,890 INFO L470 AbstractCegarLoop]: Abstraction has 56439 states and 253658 transitions. [2022-01-18 14:49:19,890 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 14:49:19,890 INFO L276 IsEmpty]: Start isEmpty. Operand 56439 states and 253658 transitions. [2022-01-18 14:49:20,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 14:49:20,034 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:20,034 INFO L514 BasicCegarLoop]: trace histogram [2, 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, 1] [2022-01-18 14:49:20,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-01-18 14:49:20,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-01-18 14:49:20,235 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:49:20,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:20,235 INFO L85 PathProgramCache]: Analyzing trace with hash -847330975, now seen corresponding path program 12 times [2022-01-18 14:49:20,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:20,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081765623] [2022-01-18 14:49:20,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:20,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:49:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:49:20,292 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 14:49:20,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:49:20,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081765623] [2022-01-18 14:49:20,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081765623] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 14:49:20,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032104447] [2022-01-18 14:49:20,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 14:49:20,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:20,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:49:20,294 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 14:49:20,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-18 14:49:20,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 14:49:20,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 14:49:20,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 14:49:20,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 14:49:20,594 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 14:49:20,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 14:49:20,742 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 14:49:20,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032104447] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 14:49:20,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 14:49:20,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 5] total 9 [2022-01-18 14:49:20,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205748848] [2022-01-18 14:49:20,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 14:49:20,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 14:49:20,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:49:20,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 14:49:20,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:49:20,743 INFO L87 Difference]: Start difference. First operand 56439 states and 253658 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 14:49:21,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:49:21,735 INFO L93 Difference]: Finished difference Result 58399 states and 261040 transitions. [2022-01-18 14:49:21,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 14:49:21,736 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 31 [2022-01-18 14:49:21,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:49:22,021 INFO L225 Difference]: With dead ends: 58399 [2022-01-18 14:49:22,021 INFO L226 Difference]: Without dead ends: 58007 [2022-01-18 14:49:22,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 11 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-18 14:49:22,021 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 74 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 14:49:22,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 133 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 14:49:22,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58007 states. [2022-01-18 14:49:23,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58007 to 56971. [2022-01-18 14:49:23,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56971 states, 56970 states have (on average 4.493487800596806) internal successors, (255994), 56970 states have internal predecessors, (255994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 14:49:23,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56971 states to 56971 states and 255994 transitions. [2022-01-18 14:49:23,579 INFO L78 Accepts]: Start accepts. Automaton has 56971 states and 255994 transitions. Word has length 31 [2022-01-18 14:49:23,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:49:23,579 INFO L470 AbstractCegarLoop]: Abstraction has 56971 states and 255994 transitions. [2022-01-18 14:49:23,579 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 14:49:23,579 INFO L276 IsEmpty]: Start isEmpty. Operand 56971 states and 255994 transitions. [2022-01-18 14:49:23,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 14:49:23,744 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:49:23,745 INFO L514 BasicCegarLoop]: trace histogram [2, 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, 1] [2022-01-18 14:49:23,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-01-18 14:49:23,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 14:49:23,959 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 14:49:23,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:49:23,960 INFO L85 PathProgramCache]: Analyzing trace with hash -642090763, now seen corresponding path program 13 times [2022-01-18 14:49:23,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:49:23,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607575428] [2022-01-18 14:49:23,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:49:23,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms